7r+4b=90

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Solution for 7r+4b=90 equation: 


Simplifying
7r + 4b = 90

Reorder the terms:
4b + 7r = 90

Solving
4b + 7r = 90

Solving for variable 'b'.

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

Add '-7r' to each side of the equation.
4b + 7r + -7r = 90 + -7r

Combine like terms: 7r + -7r = 0
4b + 0 = 90 + -7r
4b = 90 + -7r

Divide each side by '4'.
b = 22.5 + -1.75r

Simplifying
b = 22.5 + -1.75r

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