Problem solving

Question

1. The sum of twice a number and 4 times another number is 4. The first decreased by the second number is 5. Find the number.

Answer 1

2x + 4y = 4

x + 2y = 2

x-y= 5

3y = -3

y=-1

x+1 = 5

x=4

the numbers are 4 and -1