-3r+15=4(r-2)

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Solution for -3r+15=4(r-2) equation:


Simplifying
-3r + 15 = 4(r + -2)

Reorder the terms:
15 + -3r = 4(r + -2)

Reorder the terms:
15 + -3r = 4(-2 + r)
15 + -3r = (-2 * 4 + r * 4)
15 + -3r = (-8 + 4r)

Solving
15 + -3r = -8 + 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.
15 + -3r + -4r = -8 + 4r + -4r

Combine like terms: -3r + -4r = -7r
15 + -7r = -8 + 4r + -4r

Combine like terms: 4r + -4r = 0
15 + -7r = -8 + 0
15 + -7r = -8

Add '-15' to each side of the equation.
15 + -15 + -7r = -8 + -15

Combine like terms: 15 + -15 = 0
0 + -7r = -8 + -15
-7r = -8 + -15

Combine like terms: -8 + -15 = -23
-7r = -23

Divide each side by '-7'.
r = 3.285714286

Simplifying
r = 3.285714286

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