4r-20+12r+42=

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Solution for 4r-20+12r+42= equation:


Simplifying
4r + -20 + 12r + 42 = 0

Reorder the terms:
-20 + 42 + 4r + 12r = 0

Combine like terms: -20 + 42 = 22
22 + 4r + 12r = 0

Combine like terms: 4r + 12r = 16r
22 + 16r = 0

Solving
22 + 16r = 0

Solving for variable 'r'.

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

Add '-22' to each side of the equation.
22 + -22 + 16r = 0 + -22

Combine like terms: 22 + -22 = 0
0 + 16r = 0 + -22
16r = 0 + -22

Combine like terms: 0 + -22 = -22
16r = -22

Divide each side by '16'.
r = -1.375

Simplifying
r = -1.375

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