For which equation with x=3 be a solution?
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B. x-2=1

Step-by-step explanation:

3-2=1

1=1

x = 3 is a solution for x - 2 = 1.

Step-by-step explanation:

Substitute x = 3 in all the equations.

x + 7 = 4

3 + 7 = 4

10 ≠ 4

x - 2 = 1

3 - 2 = 1

1 = 1

5 + x = 9

5 + 3 = 9

8 ≠ 9

8 - x = 11

8 - 3 = 11

5 ≠ 11

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10