Question

the sum of two numbers is -1. when twice the first number and four time the second number are added, it equals -10. what are the two numbers?

Answer 1

x=3, y=-4. (3, -4). The two numbers are 3 and -4.

Explanation:

x+y=-1

2x+4y=-10

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x=-1-y

2(-1-y)+4y=-10

-2-2y+4y=-10

-2+2y=-10

2y=-10-(-2)

2y=-10+2

2y=-8

y=-8/2

y=-4

x+(-4)=-1

x-4=-1

x=-1+4

x=3