31=-2+4(r+7)

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Solution for 31=-2+4(r+7) equation:


Simplifying
31 = -2 + 4(r + 7)

Reorder the terms:
31 = -2 + 4(7 + r)
31 = -2 + (7 * 4 + r * 4)
31 = -2 + (28 + 4r)

Combine like terms: -2 + 28 = 26
31 = 26 + 4r

Solving
31 = 26 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
31 + -4r = 26 + 4r + -4r

Combine like terms: 4r + -4r = 0
31 + -4r = 26 + 0
31 + -4r = 26

Add '-31' to each side of the equation.
31 + -31 + -4r = 26 + -31

Combine like terms: 31 + -31 = 0
0 + -4r = 26 + -31
-4r = 26 + -31

Combine like terms: 26 + -31 = -5
-4r = -5

Divide each side by '-4'.
r = 1.25

Simplifying
r = 1.25

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