-21=-4+8(h-9)

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Solution for -21=-4+8(h-9) equation:


Simplifying
-21 = -4 + 8(h + -9)

Reorder the terms:
-21 = -4 + 8(-9 + h)
-21 = -4 + (-9 * 8 + h * 8)
-21 = -4 + (-72 + 8h)

Combine like terms: -4 + -72 = -76
-21 = -76 + 8h

Solving
-21 = -76 + 8h

Solving for variable 'h'.

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

Add '-8h' to each side of the equation.
-21 + -8h = -76 + 8h + -8h

Combine like terms: 8h + -8h = 0
-21 + -8h = -76 + 0
-21 + -8h = -76

Add '21' to each side of the equation.
-21 + 21 + -8h = -76 + 21

Combine like terms: -21 + 21 = 0
0 + -8h = -76 + 21
-8h = -76 + 21

Combine like terms: -76 + 21 = -55
-8h = -55

Divide each side by '-8'.
h = 6.875

Simplifying
h = 6.875

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