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Andrews [41]
3 years ago
8

Solve for x? 2x + y = 7 x - y = 5

Mathematics
2 answers:
kupik [55]3 years ago
4 0
Given 2x+y=7...1
         x-y=5...2
put x=5+y in 1
   2(5+y)+y=7
10+2y+y=7
3y=-3
y=-1
x=5+y
  =5-1
  =4
Vaselesa [24]3 years ago
3 0
X=4 because the y cancel out and all your left with is 3x=12 the you divide by 3 and get 4
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