2+2*0.75*(x-1)=2*0.8x,要具体式子、方法,
问题描述:
2+2*0.75*(x-1)=2*0.8x,要具体式子、方法,
答
2+2*0.75*(x-1)=2*0.8x
2+1.5(x-1)=1.6x
2+1.5x-1.5=1.6x
1.6x-1.5x=2-1.5
0.1x=0.5
x=0.5÷0.1
x=5