Question

4) 2x – 15 = 13;
5) 7y - 25 = 45;
6) 130 - 4x = 70;​

Answer 1

$2x - 15 = 13 \\ 2x = 13 + 15 \\ 2x = 28 \\ x = 14$

$7y - 25 = 45 \\ 7y = 45 + 25 \\ 7y = 70 \\ y = 10$

$130 - 4x = 70 \\ - 4x = 70 - 130 \\ - 4x = - 60 \\x = 15$