Which equation has the solution x = 3? A. 3x + 1 =9 B. x/3 + 5 = 6 C. 5x - 7= 1 D. 9 - 3x = 0 E. 2x + 4 = 10 F. 9/x - 1 = 4
Mathematics · Middle School · Tue Nov 03 2020
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Answered on
Determine which equation has the solution x =3
To do so, we must solve for x individually.
A. 3x + 1 = 9
3x = 9 -1
x = 8/3
B. x/3 + 5 = 6
x/3 = 6 -5
x/3 = 1
x = 3
C. 5x - 7 =1
5x = 1 + 7
5x = 8
x = 8/5
D. 9 - 3x = 0
3x = 9
x = 3
E. 2x + 4 = 10
2x =10 -4
x = 3
F. 9/x -1 = 4
9/x = 4 + 1
9/x = 5
5x = 9
x = 9/5
Final answer:
B. x/3 + 5 = 6
D. 9 - 3x = 0
E. 2x + 4 = 10