( B. )

Answer:

1.) 5(6) + 4(7) - 12

=46

2.) 7(6) - 3(8) +2(7)

= 35

Solution:

( C. )

Answer:

1.) x = 10

2.) x = 3

3.) x = -4

Step-by-step explanation:

1.) x = 7 + 3

x = 10

2.) 2x = 14 - 8

2x = 6 (divide both sides by 2)

x = 3

3.) 4x - 2x = -5 - 3

2x = -8 (divide both sides by 2)

x = -4