Sum of two numbers = 70 Difference between two numbers = 40 Greater number = x = y+40 Smaller number = y Y + Y + 40 = 70 2Y = 70 - 40 Y = 30/2 Y = 15 X = Y + 40 = 15 + 40 = 55
-x + 7 = x - 5 add x to both sides of the equation 7 = 2x - 5 add 5 to both sides of the equation 12 = 2x divide 2 from both sides of the equation 6 = x