Amyjoe23
30.12.2019 •
Mathematics
Explain why 235 is not divisible by 7
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Ответ:
Ответ:
y = x - 12so sub in x - 12 for y in the other equation
x + y = 8
x + x - 12 = 8
2x - 12 = 8
2x = 8 + 12
2x = 20
x = 20/2
x = 10
y = x - 12
y = 10 - 12
y = -2
solution is (10,-2)