1.

X+7=2y20+y=4xsimultaneous equation ​

Answer»

Answer:

x + 7 = 2 × 4x

x + 7 = 8x

8x - x = 7

7x = 7

x = 7÷7

x = 1

20 + y = 4x

20 + y = 4 × 1

20 + y = 4

y = 4-20

y = -16



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