7-0.75x=-7(3/28x+1) how do I solve that? it's a linear equation.

7-0.75x=-7(3/28x+1)

We simplify the equation to the form, which is simple to understand  

7-0.75x=-7(3/28x+1)

Reorder the terms in parentheses

7-0.75x=+(/28x-7)

Remove unnecessary parentheses

+7-0.75x=+/28x-7

We move all terms containing x to the left and all other terms to the right.  

-0.75x-28x=-7-7

We simplify left and right side of the equation.  

-28.75x=-14

We divide both sides of the equation by -28.75 to get x.  

x=0.48695652173913

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)