Question 923368
3x-y=7
Y++2x=8 (one + is sufficient)

Thank you in advance

I worked the problem

3x=(2x-8)=7  *** I'll assume the 1st = is a typo, and should be -
3x-2x+8=7 ***  OK so far
X+8=7x=-1 *** again, too many equal signs
-8-2=-10
(-1,-10)
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Start at the beginning.
3x-y=7
Y+2x=8 --> y = -2x + 8
sub for y in the 1st eqn
3x - (-2x+8) = 7
3x + 2x - 8 = 7
5x = 15
x = 3
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sub for x in any equation to find y
Y++2x=8
y + 2*3 = 8
y = 2
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You can do these, you're just careless and make mistakes.