Answer:
x = 4.
Step-by-step explanation:
2x + 3(5x - 7) = 47
2x + 15x - 21 = 47
17x - 21 = 47
17x = 68
x = 68/17
x = 4
⇔ 2x + 15x - 21 = 47
⇔ 17x - 21 = 47
⇔ 17x = 47+21
⇔ 17x = 68
⇔ x = 68/17
⇔ x = 68÷17 = 4
