7x+4+x=20
8x+4=20
8x+4-4=20-4
8x=16
Divide by 8 for 8x and 16
8x/8=16/8
x=2
Check answer by using substitution method
7(2)+4+2=20
14+6=20
20=20
Answer is x=2
Answer:
x=2
Step-by-step explanation:
7x+4+x=20
Combine like terms
8x +4 = 20
Subtract 4 from each side
8x+4-4 =20-4
8x = 16
Divide each side by 8
8x/8 = 16/8
x = 2
