Answer:
5.3+3.5=8.8
Step-by-step explanation:
x+y=8.8
x-y=1.8
add both equations togeather which cancel out y because there is a +y and a -y
2x=8.8+1.8
<u>2x=10.6</u>
2 2
x=5.3
8.8-5.3=3.5
5.3-3.5=1.8
457
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20
7
Step-by-step explanation
6+1=7
Not a solution
In order for to be a solution, the result after substituting must be 0:
Therefore, is not a solution to
-90