Какая задача? напиши!!!!!!!!!!!!!
1)2*4=8
4*3=12
5*4=20
2*3=6
20+12+8-6=34
2)12*5=60
2*4=8
4*3=12
2*3=6
60-(8+12+6)=34
40х+15-12=83
40х=83-15+12
40х= 80
х=80:40
х=2
<span>390 : (4x + 3) = 26
4x + 3 = 390 : 26
4x = 15 - 3
4x = 12
x = 12 : 4
x = 3
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