Question

please help me in these question = find the whole number n when:​

Answer 1

Answer:

Hiii Let's start solving

For the first equation

$3x + 66 = 99 \\ 3(x + 22) = 3(33) \\ x = 11$

Second equation

$2n + 5 + n = 72 + 2 \\ 3n = 69(magic \: number) \\ n = 23$

Third equation

$3n + 6n = 81 - 18 \\ 9n = 63 \\ n = 7$

4th equation

$76 + 2n = 106 - n \\ 3n = 30 \\ n = 10$

5th equation

$18 + 3n + 68 = 28 \\ 3n = 28 - 86 \\3n = 58 \\ n = 19 \frac{1}{3}$

Hope it helps