-7(10r+3)+8(7r+8)=

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Solution for -7(10r+3)+8(7r+8)= equation:


Simplifying
-7(10r + 3) + 8(7r + 8) = 0

Reorder the terms:
-7(3 + 10r) + 8(7r + 8) = 0
(3 * -7 + 10r * -7) + 8(7r + 8) = 0
(-21 + -70r) + 8(7r + 8) = 0

Reorder the terms:
-21 + -70r + 8(8 + 7r) = 0
-21 + -70r + (8 * 8 + 7r * 8) = 0
-21 + -70r + (64 + 56r) = 0

Reorder the terms:
-21 + 64 + -70r + 56r = 0

Combine like terms: -21 + 64 = 43
43 + -70r + 56r = 0

Combine like terms: -70r + 56r = -14r
43 + -14r = 0

Solving
43 + -14r = 0

Solving for variable 'r'.

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

Add '-43' to each side of the equation.
43 + -43 + -14r = 0 + -43

Combine like terms: 43 + -43 = 0
0 + -14r = 0 + -43
-14r = 0 + -43

Combine like terms: 0 + -43 = -43
-14r = -43

Divide each side by '-14'.
r = 3.071428571

Simplifying
r = 3.071428571

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