4(1.20+b)=7.20

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Solution for 4(1.20+b)=7.20 equation: 


Simplifying
4(1.20 + b) = 7.20
(1.20 * 4 + b * 4) = 7.20
(4.8 + 4b) = 7.20

Solving
4.8 + 4b = 7.20

Solving for variable 'b'.

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

Add '-4.8' to each side of the equation.
4.8 + -4.8 + 4b = 7.20 + -4.8

Combine like terms: 4.8 + -4.8 = 0.0
0.0 + 4b = 7.20 + -4.8
4b = 7.20 + -4.8

Combine like terms: 7.20 + -4.8 = 2.4
4b = 2.4

Divide each side by '4'.
b = 0.6

Simplifying
b = 0.6

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