4(2(10.5)+1)-3(2(10.5)-5)=40

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Solution for 4(2(10.5)+1)-3(2(10.5)-5)=40 equation: 


Simplifying
4(2(10.5) + 1) + -3(2(10.5) + -5) = 40

Multiply 2 * 10.5
4(21 + 1) + -3(2(10.5) + -5) = 40

Combine like terms: 21 + 1 = 22
4(22) + -3(2(10.5) + -5) = 40

Multiply 4 * 22
88 + -3(2(10.5) + -5) = 40

Multiply 2 * 10.5
88 + -3(21 + -5) = 40

Combine like terms: 21 + -5 = 16
88 + -3(16) = 40

Multiply -3 * 16
88 + -48 = 40

Combine like terms: 88 + -48 = 40
40 = 40

Add '-40' to each side of the equation.
40 + -40 = 40 + -40

Combine like terms: 40 + -40 = 0
0 = 40 + -40

Combine like terms: 40 + -40 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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