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1 year ago

90 = 10(x + 7) solve for xshow steps & describe the number of solutions

Mathematics

2 answers:

Alex787 [66]1 year ago

5 0

Answer:

x = 2

Step-by-step explanation:

My name is Ann [436]1 year ago

4 0

Simplifying

90 = 10(x + 7)

Reorder the terms:

90 = 10(7 + x)

90 = (7 * 10 + x * 10)

90 = (70 + 10x)

Solving

90 = 70 + 10x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-10x' to each side of the equation.

90 + -10x = 70 + 10x + -10x

Combine like terms: 10x + -10x = 0

90 + -10x = 70 + 0

90 + -10x = 70

Add '-90' to each side of the equation.

90 + -90 + -10x = 70 + -90

Combine like terms: 90 + -90 = 0

0 + -10x = 70 + -90

-10x = 70 + -90

Combine like terms: 70 + -90 = -20

-10x = -20

Divide each side by '-10'.

x = 2

Simplifying

x = 2

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90 = 10(x + 7) solve for xshow steps & describe the number of solutions ​

90 = 10(x + 7) solve for xshow steps & describe the number of solutions