x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验

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x+1.8=4.2x+1.8-1.8=4.2-1.8x=2.4怎么检验x+1.8=4.2x+1.8-1.8=4.2-1.8x=2.4怎么检验x+1.8=4.2x+1.8-1.8=4.2-1.8x=2.

x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验
x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验

x+1.8=4.2 x+1.8-1.8=4.2-1.8 x=2.4 怎么检验
检验
将x=2.4代人左边,
x+1.8=2.4+1.8=4.2 =右边

2.4+1.8=4.2

1.8x-x=2.4x=？ 40%x+70%x-x=1.8 1.8x-x=17. 1.8x-2.4=x 1.8X-X=2.4 1.8x-7.2=x X+20%X=1.8 x^2+3x-1.8=x x=? x^2+3x+1.8=0 x=? 1.8x(3x-2.5)-3.8x=1.54 x^2+3x-1.8=0 求x 0.6x+2.8x=12.8+1.8x 1.8x()+8.2x()=6.5x是乘号! x-3/10x=3/10x-1.8+4.6 8x-4.8x+1.6=6-1.8x 1.8+7X=3.9 X=? 4x-2.5=1.8.x=? 解方程:10%x=x-1.8