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pychu [463]
4 years ago
8

Solve the system using elimination. 5x = –25 + 5y 10y = 42 + 2x

Mathematics
1 answer:
Serga [27]4 years ago
3 0
<span>5x = –25 + 5y ---> 5x - 5y = -25 (1)
10y = 42 + 2x </span>---> 2x - 10y = -42 (2)
divide equation (2) by 2
so
x - 5y = -21

now you have
5x - 5y = -25
x - 5y = -21
-----------------subtract
4x = -4
  x = -1

substitute x = -1 into 5x - 5y = -25
5x - 5y = -25
5(-1) - 5y = -25
-5 - 5y = -25
-5y = -20
   y = 4

answer
(-1 , 4)

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