Question

#1 -7 + 13x + 2x + 8
#2 9 + 7y - 2 - 5y
#3 2 + 3x - 4x + 6
#4 5 + 2x + 2
#5 2(4x - 1) + x
#6 6x + 2(x + 4)
#7 3(x + 5) - 10
#8 15x - (x - 4)

Explanation:

#1

Step1: Combine like terms (x terms and constants)

$ -7 + 13x + 2x + 8 = (13x + 2x) + (-7 + 8) $

Step2: Simplify each group

$ = 15x + 1 $

Step1: Combine like terms (y terms and constants)

$ 9 + 7y - 2 - 5y = (7y - 5y) + (9 - 2) $

Step2: Simplify each group

$ = 2y + 7 $

Step1: Combine like terms (x terms and constants)

$ 2 + 3x - 4x + 6 = (3x - 4x) + (2 + 6) $

Step2: Simplify each group

$ = -x + 8 $

Answer:

$15x + 1$

#2