1)
40 + 2х = 3х -15
2х - 3х = -15 - 40
- х = -55
х = 55
2)
23,8у - 80 - 24,3у = 2
23,8у - 24,3у = 2+ 80
- 0,5у = 82
у=82:(-0,5)
у = - 164
<span>62•47+27434÷(9570÷15)•y=366522
</span>62•47+27434÷638•y=366522
2914+27434÷638•y=366522
2914+43•y=366522
2957•y=366522
y=366522÷2957
y=123.9506
Вот.
<span>78/3-95/(82-63)+56×3+1000/200
1)82-63 = 19
2)78/3 = 26
3)95/19 = 5
4)56*3 = 168
5)1000/200 = 5
6) 26 - 5 = 21
7)21+168 = 189
8) 189+ 5 = 194</span>