Помогите решить уравнение - х+120=40х5 , х+20 =40х5 , х * 5 = 240 , х * 100 = 240 , 9 * х = 72 , 8 * х = 72 .
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х=40×50-120=1780
40×50=2000-120=1780
2)х+20=40×5
х=40×5-20=180
40×5=200-20=180
3)х×5=240
х=240÷5
×=48
4)х×100=240
х=240÷100=2(ост.4)
5) 9×х=72
х=72÷9=8
6)8×х=72
х=72÷8=9