10(r-3)=40

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Solution for 10(r-3)=40 equation:


Simplifying
10(r + -3) = 40

Reorder the terms:
10(-3 + r) = 40
(-3 * 10 + r * 10) = 40
(-30 + 10r) = 40

Solving
-30 + 10r = 40

Solving for variable 'r'.

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

Add '30' to each side of the equation.
-30 + 30 + 10r = 40 + 30

Combine like terms: -30 + 30 = 0
0 + 10r = 40 + 30
10r = 40 + 30

Combine like terms: 40 + 30 = 70
10r = 70

Divide each side by '10'.
r = 7

Simplifying
r = 7

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