Завдання 1301 - 1402 » 1373

Знайди корінь рівняння: 1) 2х + 6 = 8; 2х = 8 – 6; 2х = 2; х = 1. 2) 3 – 4у = –1; –4у = –1 – 3; –4у = –4; у = 1. 3) –10 + 5m = 4; 5m = 4 + 10; 5m = 14; m = 14 : 5; m = 2,8. 4) 7x = 3x – 5; 7x – 3x = –5; 4x = –5; x = –5 : 4; x = –1,25; 5) –2m = 14 + 8m; –2m – 8m = 14; –10m = 14; m = 14 : (–10); m = –1,4. 6) 3y = –5y + 16; 3y + 5y = 16; 8y = 16; y = 16 : 8; y = 2.