11 8-y=2 y=-6 1.3X+189=521 45.7x=7 11.12x=144 26:x=12 y=85 (41) 75x+43y=8472 17x-y=1394 答案.9x=9 13.10x=100 14;4 8X*6=5 x=5/:x=84 y=93 (35) 45x-30y=-1455 29x-y=725 答案:x=44 y=54 (26) 79x-76y=-4388 26x-y=832 答案:x=91 y=30 (47) 21x-63y=84 20x+y=1880 答案..-2(x-1)=4 44.2x+1= -2+x 42.6 5Y*5=27 y=27/.4x-3(20-x)=3 43:x=18 y=34 (20) 70x+13y=3520 52x+y=2132 答案.66-x=10 8:x=41 y=50 (21) 48x-54y=-3186 24x+y=1080 答案:x=43 y=78 (24) 28x+28y=3332 52x-y=4628 答案.11111x=123454321 36:x=40 y=12 (14) 32x+62y=5134 57x+y=2850 答案;3 4Y+11=22 y=11/.46/.x+6=18 4.22x=484 33.20x=400 31.14x=196 28.1235467564x=0 41:x=41 y=92 3X+18=52 x=34/.8x=64 22.4Y+119=22 5 46:x=91 y=78 (29) 85x+67y=7338 11x+y=308 答案:x=26 y=62 (11) 85x-92y=-2518 27x-y=486 答案.19x=361 33;9=4 y=63/.3x=27 10:x=25 y=92 (49) 99x-67y=4011 75x-y=5475 答案:x=25 y=86 (36) 11x-43y=-1361 47x+y=799 答案.7x=49 16.13x=169 27.2 2x+5=10 3x-15=75 4x+4o=320 3x+77=122 5x-1.99/.10x=100 24.4 500-12x=140 1) 66x+17y=3967 25x+y=1200 答案:x=13 y=41 (28) 69x-96y=-1209 42x+y=3822 答案.X