-3(1r+3)=-1(-6+36)

Solution for -3(1r+3)=-1(-6+36) equation:

Simplifying
-3(1r + 3) = -1(-6 + 36)

Reorder the terms:
-3(3 + 1r) = -1(-6 + 36)
(3 * -3 + 1r * -3) = -1(-6 + 36)
(-9 + -3r) = -1(-6 + 36)

Combine like terms: -6 + 36 = 30
-9 + -3r = -1(30)

Multiply -1 * 30
-9 + -3r = -30

Solving
-9 + -3r = -30

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + -3r = -30 + 9

Combine like terms: -9 + 9 = 0
0 + -3r = -30 + 9
-3r = -30 + 9

Combine like terms: -30 + 9 = -21
-3r = -21

Divide each side by '-3'.
r = 7

Simplifying
r = 7