z*10+9=7

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Solution for z*10+9=7 equation:


Simplifying
z * 10 + 9 = 7

Reorder the terms for easier multiplication:
10z + 9 = 7

Reorder the terms:
9 + 10z = 7

Solving
9 + 10z = 7

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 + 10z = 7 + -9

Combine like terms: 9 + -9 = 0
0 + 10z = 7 + -9
10z = 7 + -9

Combine like terms: 7 + -9 = -2
10z = -2

Divide each side by '10'.
z = -0.2

Simplifying
z = -0.2

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