6.4+2.19(z-2)=8.5

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Solution for 6.4+2.19(z-2)=8.5 equation: 


Simplifying
6.4 + 2.19(z + -2) = 8.5

Reorder the terms:
6.4 + 2.19(-2 + z) = 8.5
6.4 + (-2 * 2.19 + z * 2.19) = 8.5
6.4 + (-4.38 + 2.19z) = 8.5

Combine like terms: 6.4 + -4.38 = 2.02
2.02 + 2.19z = 8.5

Solving
2.02 + 2.19z = 8.5

Solving for variable 'z'.

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

Add '-2.02' to each side of the equation.
2.02 + -2.02 + 2.19z = 8.5 + -2.02

Combine like terms: 2.02 + -2.02 = 0.00
0.00 + 2.19z = 8.5 + -2.02
2.19z = 8.5 + -2.02

Combine like terms: 8.5 + -2.02 = 6.48
2.19z = 6.48

Divide each side by '2.19'.
z = 2.95890411

Simplifying
z = 2.95890411

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