0.72+1.9+0.12=5.5-0.4z

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Solution for 0.72+1.9+0.12=5.5-0.4z equation: 


Simplifying
0.72 + 1.9 + 0.12 = 5.5 + -0.4z

Combine like terms: 0.72 + 1.9 = 2.62
2.62 + 0.12 = 5.5 + -0.4z

Combine like terms: 2.62 + 0.12 = 2.74
2.74 = 5.5 + -0.4z

Solving
2.74 = 5.5 + -0.4z

Solving for variable 'z'.

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

Add '0.4z' to each side of the equation.
2.74 + 0.4z = 5.5 + -0.4z + 0.4z

Combine like terms: -0.4z + 0.4z = 0.0
2.74 + 0.4z = 5.5 + 0.0
2.74 + 0.4z = 5.5

Add '-2.74' to each side of the equation.
2.74 + -2.74 + 0.4z = 5.5 + -2.74

Combine like terms: 2.74 + -2.74 = 0.00
0.00 + 0.4z = 5.5 + -2.74
0.4z = 5.5 + -2.74

Combine like terms: 5.5 + -2.74 = 2.76
0.4z = 2.76

Divide each side by '0.4'.
z = 6.9

Simplifying
z = 6.9

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