Question

I need help pleas 100 points

Answer 1

x = 5

y = -1

Explanation:

x + 4y = 1

3x + 5y = 10

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x = 1 - 4y -----> 3(1-4y) + 5y = 10 ------> 3 - 12y + 5y = 10 ----> - 12y+5y = 10 - 3

(-1)(- 12y+5y) = (10-3)(-1) -----> 12y-5y = -10+3 -----> 7y = - 7 ----> y = -7/7 = -1

y = -1 ----> x = 1 - 4y = 1 - 4(-1) = 1+4 = 5------> x = 5