Question

the sum of two rational number is -4. If one of them is -16/7, find the other

Answer 1

let x=-16/7 & y be the other number

now, x+y=-4
-16/7+y=-4
y=-4+16/7
y=(-28+16)/7
y=-12/7

Answer 2

x+(-16/7)=-4
x-16/7=-4
x=-4+16/7
x=-28+16/7
x=-12/7