作业帮(2){3t-4s=14,5t+4s=2 (3){2m+9n=4.8,3m-5n=-15 (4)3x-2y=8,2y+3z=1,x+5y-z=-4
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(2){3t-4s=14,5t+4s=2 (3){2m+9n=4.8,3m-5n=-15 (4)3x-2y=8,2y+3z=1,x+5y-z=-4
(2){3t-4s=14,5t+4s=2 (3){2m+9n=4.8,3m-5n=-15 (4)3x-2y=8,2y+3z=1,x+5y-z=-4
(2){3t-4s=14,5t+4s=2 (3){2m+9n=4.8,3m-5n=-15 (4)3x-2y=8,2y+3z=1,x+5y-z=-4
1.t=2,s= - 2
2.m= - 3,n=1.2
3.x=2,y= - 1 ,z=1