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Delvig [45]
3 years ago
8

Find the solution of 2x+2y=10 and x=5y+20

Mathematics
1 answer:
Sever21 [200]3 years ago
8 0

Answer:

(15/2, -5/2)

Step-by-step explanation:

1. Sub x=5y+20 into 2x+2y=10 and simplify as shown below.

  2(5y+20)+2y=10

  10y+40+2y=10

  12y+40=10

  12y=-30

  y=-30/12

  y=-5/2

2. Sub in y=-5/2 into 2x+2y=10 to find x and simplify as shown below.

  2x+2(-5/2)=10  

  2x-5=10

  2x=15

  x=15/2

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