Seudónimo
Seudónimo
30-11-2017
Mathematics
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choixongdong
choixongdong
30-11-2017
3x + 2 = y + 1
x + 3 = y
substitute x + 3 = y into 3x + 2 = y + 1
3x + 2 = y + 1
3x + 2 = x + 3 + 1
3x + 2 = x + 4
2x = 2
x = 1
y = x + 3
y = 1 + 3
y = 4
answer
x = 1 answer is second choice
y = 4 answer is first choice
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