-21.8z+3(-3+7z)=-10

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Solution for -21.8z+3(-3+7z)=-10 equation: 


Simplifying
-21.8z + 3(-3 + 7z) = -10
-21.8z + (-3 * 3 + 7z * 3) = -10
-21.8z + (-9 + 21z) = -10

Reorder the terms:
-9 + -21.8z + 21z = -10

Combine like terms: -21.8z + 21z = -0.8z
-9 + -0.8z = -10

Solving
-9 + -0.8z = -10

Solving for variable 'z'.

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

Add '9' to each side of the equation.
-9 + 9 + -0.8z = -10 + 9

Combine like terms: -9 + 9 = 0
0 + -0.8z = -10 + 9
-0.8z = -10 + 9

Combine like terms: -10 + 9 = -1
-0.8z = -1

Divide each side by '-0.8'.
z = 1.25

Simplifying
z = 1.25

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