Question

1. Реши уравнение. (х – 80) × 6 + 90 = 330

Answer 1

(х – 80) ×6 + 90 = 330
(х-80)х6=330-90
(х-80)х6=240
(х-80)=240:6
х-80=40
х=40+80
х=120
(120-80)х6+90=330
330=330