36 * (5а + 19)=30а + 1134
180a + 684 = 30a + 1134
180a - 30a = 1134 - 684
150a = 450
a=450:150
a=3
---------------------------
36*(5*3+19)=30*3+1134
36*(15+19)=90+1134
36*34=1224
1224=1224
======================
725t - 123 t - 292 = 912
602t - 292 = 912
602t = 912+292
602t = 1204
t=1204:602
t=2
---------------------------
725*2 - 123*2 - 292=912
1450 - 246 -292 =912
912=912