3 years ago

7x+4+x=20 what is x? plz help

Mathematics

2 answers:

Tamiku [17]3 years ago

4 0

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

Ivenika [448]3 years ago

3 0

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

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