108-271+215-_____=-103
Im going to combine the first thee numbers and replace the blank with a variable, lets use x.
52 - x=-103
now I am going to subtract 52 on both sides to get the variable alone
-x=-155
Im going to multiply both sides to eliminate the negitive in the variable
x=155
If you want to check just plug 155 into the blank
108-271+215-155=-103
-163+215-155=-103
52-155=-103
-103=-103
so after checking work the blank is equal to 155.
15*3+4*2=45+8=53
multiply 15 by 3 and 2 by 4 then add the answers!
The expression written as an algebraic expression is 14x+10
Multiply the top one by 3 for x, so you can eliminate x and find y
then plug in the y into one of the equations to find x