315-p+185
500-p
500-148=352
500-213=287
427-167-i
260-i
260-260=0
260-59=201
Х+35-12=93
х+23=93
х=93-23
х=70
1) 5х+15у+8х-16у=13х-1у
2)23х+15х+20у+2у=38х+22у
3)7х+32+3у+4х+16у=11х+19у+32
4)45х+18х+24у-10у=63х+14у
5)32х+80+68+6х-31=38х+117
6)25+7х+6х+30+123=13х+178
7)4у+64+18у+42-34=22у+72
8)2х+72+3х+24+43=5х+139
9)2(24+4х+8)+81+31х=48+8х+16+81+31х=39х+145
( 3 9/13 + У) - 4 9/13 = 1 7/13
3 9/13 + У = 4 9/13 + 1 7/13
3 9/13 + У = 6 3/13
У = 6 3/13 - 3 9/13
У = 2 7/13
(3 9/13 + 2 7/13) - 4 9/13 = 1 7/13