three times a first number decreased by a second number is 13. The first number increased by four times the second number is -26.

Answer 1

The equations to use are as follows: 3x-y =13 and x+4y =-26 Multiply the first equation by 4 to get 12x - 4y = 52. Add this equation to the second equation to get13x = 26. Hence x=2. Substitute this into the first equation to get y= -7 So the answer is x=2 and y=-7.