3x-x+5x-6=8 1.9-0.34=3.16+1.2x 2(6-2x) +3(2x-3)=17 15X-2(4-3x)=3415 12.5 +3(2.6X+1.5)=9.6X+2.6
问题描述:
3x-x+5x-6=8 1.9-0.34=3.16+1.2x 2(6-2x) +3(2x-3)=17 15X-2(4-3x)=3415 12.5 +3(2.6X+1.5)=9.6X+2.6
是求未知数 .
答
3x-x+5x-6=87x=8+67x=14x=21.9-0.34=3.16+1.2x 1.2x=1.9-0.34-3.161.2x=-1.6x=- 4/32(6-2x) +3(2x-3)=1712-4x+6x-6=176x-4x=17+6-122x=11x=5.515X-2(4-3x)=3415 15x-8+6x=341515x+6x=8+341521x=3423x=16312.5 +3(2....