Question

Pick out the solution from the values given in the bracket for the following equation: 3x + 5 = 20 (3, 5, 7)

Answer 1

3x+5=20
1) for x=3
3(3)+5= 9+5= 14 which is not= rhs 20
This is the wrong option.
2) for x=5
3(5)+5=15+5=20 which is equal to the rhs 20
This is the correct option.
3) for x=7
3(7)+5=21+5=26 again not= rhs 20
This is the wrong option.
Therefore, the correct answer is option b) 5.