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tatyana61 [14]
4 years ago
11

0.7x-y=4.22 5-0.8x= 0.2y

Mathematics
1 answer:
Shtirlitz [24]4 years ago
6 0

The solution of the set of equation is

x=6.217

y=0.132

<u>Step-by-step explanation:</u>

given the set of equations

0.7x-y=4.22(1)

5-0.8x=0.2y

-0.8x-0.2y=-5   (2)

multiply (1) and(2) by 10

7x-10y=42.2(3)

-8x-2y=-50(4)

solve (3) and (4) using elimination method

(4)\times 5

⇒-40x-10y=-250(5)

(5)-(3)

-47x=-292.2

x=6.217

substituting value of x in 3

we get y=0.132

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