Question

Solve 7x-8y-11=0 ; 8x-7y-7=0 by elimination method

Answer 1

Answer:

7x-8y-11=0 and x8-7y-7=0 ... sis can u answer my another question of elimination for 8 points i will ur answers the best.

Step-by-step explanation:

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Answer 2

7x - 8y = 11 ........eq 1

8x - 7y = 7 .........eq 2

Multiply eq 1 by 8 & eq 2 by 7

56x - 64y = 88

56x - 49y = 49

By elimination method

56x - 64y = 88

56x - 49y = 49

- + -

-15y = 39

y = – 39/15 = - 2.6

put value of y in eq 1

we get: 7x - 8 (-39/15) = 11

7x + 312/15 = 11

7x = - 98/10

x = - 98/70 = - 1.4

so, x = -1.4 & y = -2.6

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