-4x+5x=12-25
-x=-13
x=13
может так?
2 вариант:
-4x+5x=12-25
4x-5x=-12+25
-x=13
x=-13
я не знаю, как вы решаете:)
![( 3^{6} :10 - 0.03^{2} * 1000) : 0.5^{3}](https://tex.z-dn.net/?f=%28+3%5E%7B6%7D+%3A10+-+0.03%5E%7B2%7D+%2A+1000%29+%3A+0.5%5E%7B3%7D)
= (729:10 - 0.0009 * 1000 ) :
![0.5^{3}](https://tex.z-dn.net/?f=0.5%5E%7B3%7D)
= (72.9 - 0.9 ) :
![0.5^{3}](https://tex.z-dn.net/?f=0.5%5E%7B3%7D)
= 72 :
![0.5^{3}](https://tex.z-dn.net/?f=0.5%5E%7B3%7D)
= 72 : 0.125 = 576
3.(60-4):7=8
4.(42-36)*5=30
5.54:(13-7)=9
6.(39-30)*6=54
(4/5) / (8/3)=(4/5) *(3/8)=12/40=3/10=0,3
0,3-0,12=0,18
4/7*126/100=4/7*63/50=252/350=126/175
126/175 + 8/100=(882+32)/700=914/700=457/350=1 целая 107/350