Writing and solving equations
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Writing and Solving Equations. Write an equation and solve. The sum of 38 and twice a number is 124. Find the number. 38+2x=124 x = 43 Four less than half a number is seventeen. Find the number. .5x-4=17 x = 42. Write and solve equation. Find three consecutive integers whose sum is 171.

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Writing and Solving Equations

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Writing and solving equations

Writing and Solving Equations


Write an equation and solve

Write an equation and solve.

  • The sum of 38 and twice a number is 124. Find the number.

    38+2x=124

    x = 43

  • Four less than half a number is seventeen. Find the number.

    .5x-4=17

    x = 42


Write and solve equation

Write and solve equation.

  • Find three consecutive integers whose sum is 171.

    x + (x+1) + (x+2) = 171

    3x+3 = 171

    x = 56

  • Find four consecutive integers whose sum is 246.

    x + (x+1) + (x+2) + (x+3) = 246

    4x + 6 = 246

    x = 60


Write and solve equation1

Write and solve equation.

  • Burt’s Burger Barn sold 495 hamburgers today. The number sold with cheese was half the number sold without cheese. How many of each kind were sold?

    w = with cheese

    o = with out cheese

    w + o = 495

    w = (1/2) o

    .5o + o = 495

    1.5 o = 495

    o = 330

    w = 165


Write and solve equation2

Write and solve equation.

  • Brian has $88 in his savings account. If he saves $3.50 per week, how long will it take him to have $200 in his account?

    x = week

    200 = 88 + 3.5 x

    x = 32 weeks


Write and solve equation3

Write and solve equation.

  • The width of a rectangle is 15 cm. less than the length. The perimeter is 98 cm. Find the rectangle’s dimensions.

    w = width

    l = length

    w = l -15

    2w + 2l = 98


Write and solve equation4

Write and solve equation.

  • In ∆ABC, ےA is three times as large as B and also 16° larger than C. Find the measure of each angle.

    A = 3B

    A = 16 + C

    A + B + C = 180

    3B + B + (3B-16) = 180

    7B -16 = 180

    B = 28

    A = 84

    C = 68


Writing and solving equations

HW pg 113 2 -26 even


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