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3 years ago

5(2x - 8) + 15 = -15

2 answers:

6 0

10x - 40 + 15 = -15 (use distributive)
10x - 25 = -15. add integers on left

10x = 10 add 25 to both sides
x = 1 divide by 10

pychu [463]3 years ago

4 0

Answer:

x = 1

Step-by-step explanation:

Given

5(2x - 8) + 15 = - 15 ( subtract 15 from both sides )

5(2x - 8) = - 30 ( divide both sides by 5 )

2x - 8 = - 6 ( add 8 to both sides )

2x = 2 ( divide both sides by 2 )

x = 1

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Step-by-step explanation:

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2 years ago

If the ratio of purple marbles to orange marbles is 3 to 8, how many orange marbles will I have if I have 48 purple marbles?

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Answer:

You will have 128 orange marbles

Step-by-step explanation:

Set this up as an equation

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Cross multiply

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3x ÷ 3 = 384 ÷ 3

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Check work:

Substitute the variable x for the answer

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Cross multiply

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