Question

Seven times a number plus three times another number equals -1 the sum of two numbers is -3 what are the numbers? 25 points!!

Answer 1

first number=2

second number=-5

Explanation:

first number= a

second number= b

we have the following equations

7a+3b=-1 equation 1

a+b=-3 equation 2

using equation 2 we have

a=-3-b

using equation 1 we have

7(-3-b)+3b=-1

-21-7b+3b=-1

-4b=20

b=-20/4=-5 = second number

a+(-5)=-3

a-5=-3

a=-3+5

a=2= first number