I think it would be 315. because 4.5*70..but im not sure
X=7
after you remove parentheses you do those steps
<u>Given</u>:
The system of linear equations are
and 
We need to determine the solution to the system of equations using substitution method.
<u>Solution</u>:
The solution can be determined using the substitution method.
Let us substitute
in the equation 
Thus, we have;




Thus, the value of y is -17.
Substituting
in the equation
, we get;


Thus, the value of x is -13.
Hence, the solution to the system of equations is (-13,-17)
Which numbers do you want? Also, you have to do the same thing on the other side if you do it on one.