3(4r-7)-4(r+2)=0

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Solution for 3(4r-7)-4(r+2)=0 equation:


Simplifying
3(4r + -7) + -4(r + 2) = 0

Reorder the terms:
3(-7 + 4r) + -4(r + 2) = 0
(-7 * 3 + 4r * 3) + -4(r + 2) = 0
(-21 + 12r) + -4(r + 2) = 0

Reorder the terms:
-21 + 12r + -4(2 + r) = 0
-21 + 12r + (2 * -4 + r * -4) = 0
-21 + 12r + (-8 + -4r) = 0

Reorder the terms:
-21 + -8 + 12r + -4r = 0

Combine like terms: -21 + -8 = -29
-29 + 12r + -4r = 0

Combine like terms: 12r + -4r = 8r
-29 + 8r = 0

Solving
-29 + 8r = 0

Solving for variable 'r'.

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

Add '29' to each side of the equation.
-29 + 29 + 8r = 0 + 29

Combine like terms: -29 + 29 = 0
0 + 8r = 0 + 29
8r = 0 + 29

Combine like terms: 0 + 29 = 29
8r = 29

Divide each side by '8'.
r = 3.625

Simplifying
r = 3.625

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