(80+x)(1.4)=80(0.5)+0.9x

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Solution for (80+x)(1.4)=80(0.5)+0.9x equation: 



(80+x)(1.4)=80(0.5)+0.9x

We move all terms to the left:

(80+x)(1.4)-(80(0.5)+0.9x)=0

We add all the numbers together, and all the variables

(x+80)(1.4)-(80(0.5)+0.9x)=0

We multiply parentheses ..

(+1.4x+112)-(80(0.5)+0.9x)=0



We calculate terms in parentheses: -(80(0.5)+0.9x), so:

80(0.5)+0.9x

determiningTheFunctionDomain
0.9x+80(0.5)

We add all the numbers together, and all the variables

0.9x+40

Back to the equation:

-(0.9x+40)



We add all the numbers together, and all the variables

(1.4x+112)-(0.9x+40)=0

We get rid of parentheses

1.4x-0.9x+112-40=0

We add all the numbers together, and all the variables

0.5x+72=0

We move all terms containing x to the left, all other terms to the right

0.5x=-72

x=-72/0.5

x=-144

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