Question

2. Розв'яжи рiвняння. a) 7x-10 = 10x + 11; 6) 3(x-5) = x + 3. СРОЧНО ДАЮ 35 БАЛОВ​

Answer 1

Ответ:

$7x - 10= 10x + 11 \\ 7x - 10x = 11 + 10 \\ - 3x = 21 \\ x = - 7 \\ 3(x - 5) = x + 3 \\ 3x - 15 = x + 3 \\ 3x - x = 3 + 15 \\ 2x = 18 \\ x = 9$