3(4-r)=7-4r

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Solution for 3(4-r)=7-4r equation:


Simplifying
3(4 + -1r) = 7 + -4r
(4 * 3 + -1r * 3) = 7 + -4r
(12 + -3r) = 7 + -4r

Solving
12 + -3r = 7 + -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.
12 + -3r + 4r = 7 + -4r + 4r

Combine like terms: -3r + 4r = 1r
12 + 1r = 7 + -4r + 4r

Combine like terms: -4r + 4r = 0
12 + 1r = 7 + 0
12 + 1r = 7

Add '-12' to each side of the equation.
12 + -12 + 1r = 7 + -12

Combine like terms: 12 + -12 = 0
0 + 1r = 7 + -12
1r = 7 + -12

Combine like terms: 7 + -12 = -5
1r = -5

Divide each side by '1'.
r = -5

Simplifying
r = -5

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