40=-10r-30

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Solution for 40=-10r-30 equation:


Simplifying
40 = -10r + -30

Reorder the terms:
40 = -30 + -10r

Solving
40 = -30 + -10r

Solving for variable 'r'.

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

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

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

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

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

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

Divide each side by '10'.
r = -7

Simplifying
r = -7

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