4(r+5)-2=12

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Solution for 4(r+5)-2=12 equation:


Simplifying
4(r + 5) + -2 = 12

Reorder the terms:
4(5 + r) + -2 = 12
(5 * 4 + r * 4) + -2 = 12
(20 + 4r) + -2 = 12

Reorder the terms:
20 + -2 + 4r = 12

Combine like terms: 20 + -2 = 18
18 + 4r = 12

Solving
18 + 4r = 12

Solving for variable 'r'.

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

Add '-18' to each side of the equation.
18 + -18 + 4r = 12 + -18

Combine like terms: 18 + -18 = 0
0 + 4r = 12 + -18
4r = 12 + -18

Combine like terms: 12 + -18 = -6
4r = -6

Divide each side by '4'.
r = -1.5

Simplifying
r = -1.5

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