Help please I will mark brainliest for the first person who answers
2 answers:
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Answer:
Step-by-step explanation:
We are going to do a replacement of x for a second equation
So instead
in the place of x we are putting 12-y from the first equation, so
To leave the brackets we need to do multiplication
Which is
How to determine x? From the first equation:
If the x +y = 12 then the x = 12-y so x = 12-7 = 5
We should write solution as a pair: