7+4r=-15

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Solution for 7+4r=-15 equation: 


Simplifying
7 + 4r = -15

Solving
7 + 4r = -15

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + 4r = -15 + -7

Combine like terms: 7 + -7 = 0
0 + 4r = -15 + -7
4r = -15 + -7

Combine like terms: -15 + -7 = -22
4r = -22

Divide each side by '4'.
r = -5.5

Simplifying
r = -5.5

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