Question

if 4 times a number is decreased by 9 and then increased by 12, the result is 5 less than 2 times the number. find the number. B

Answer 1

Explanation:

(4x - 9) + 12 = 2x - 5 Remove the brackets

4x - 9 + 12 = 2x - 5 Combine the left

4x + 3 = 2x - 5 Subtract 2x from both sides

4x - 2x + 3 = - 5 Combine

2x + 3 = - 5 Subtract 3 from both sides

2x + 3 -3 = - 5 -3 Combine

2x = - 8 Divide by 2

x = -8/2

x = -4