Question

Which is the following have the correction solution? Select all that apply.

Question 1 options:

a)3x+7=10; x=−1

b)5(x+4)−x=40; x = 5

c)x−34=3; x=12

d)7=13x+5; x=6

Answer 1

(b) is correct.

Explanation:

We substitute the given value of x in each equation and see if they fit.

a) 3x + 7 = 10 Plug in x = -1:

3(-1) + 7 = 4 so this solution is incorrect>

b) is correct because

5(5+4) - 5 = 45 - 5 = 40.

c and d are incorrect.