Завдання 1301 - 1402 » 1374

Розв’яжи рівняння: 1) 3x + 10 = 16; 3x = 16 – 10; 3x = 6; x = 6 : 3; x = 2. 2) 2 – 3y = –4; –3y = –4 –2; –3y = –6; y = –6 : (–3); y = 2. 3) –5 + 2t = –7; 2t = –7 + 5; 2t = –2; t = –2 : 2; t = –1. 4) 5x = –8 + x; 5x – x = –8; 4x = –8; x = –8 : 4; x = –2. 5) –4y = 7 + 3y; –4y –3y = 7; –7y = 7; y = 7 : (–7); y = –1. 6) 8m = –2m + 9; 8m + 2m = 9; 10m = 9; m = 9 : 10; m = 0,9.