1.2y+6y=11-3, 8y=8, y=8/8, y=1其他如上步骤解出就行。小朋友,作业要自己做!
(1)2y+3=11-6y2y+6y=11-38y=8y=1(2)2x-1=5x+72x-5x=7-1-3x=6x=-6/3x=-2(3)1/3x-1-2x=-1-1/6x=-1x=-1*-6x=6(4)1/2x-3=5x+1/41/2x-5x=1/4+39/2x=13/4x=13/18
y=1x=-8/3