7r+3=4r-18

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Solution for 7r+3=4r-18 equation:


Simplifying
7r + 3 = 4r + -18

Reorder the terms:
3 + 7r = 4r + -18

Reorder the terms:
3 + 7r = -18 + 4r

Solving
3 + 7r = -18 + 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.
3 + 7r + -4r = -18 + 4r + -4r

Combine like terms: 7r + -4r = 3r
3 + 3r = -18 + 4r + -4r

Combine like terms: 4r + -4r = 0
3 + 3r = -18 + 0
3 + 3r = -18

Add '-3' to each side of the equation.
3 + -3 + 3r = -18 + -3

Combine like terms: 3 + -3 = 0
0 + 3r = -18 + -3
3r = -18 + -3

Combine like terms: -18 + -3 = -21
3r = -21

Divide each side by '3'.
r = -7

Simplifying
r = -7

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