8(x十2.5)=40x+2.5=40÷8x+2.5=5x=2.5
->(8+2)x=44.24->10x=44.24->x=4.424
64x+8=30.4 64x=22.4 x=0.35
寒樱暖暖为你9X+12=849X=84-129X=72X=8(或在客户端右上角评价点【满意】)是我前进的动力!也会给你带去财富值的.如有不明白,直到完成弄懂此题!
X+20=25,X=25-20,X=5,检验:把X=5代入方程:左边=5+8*2.5=25=右边.
1.5x +8X2.5=27.51.5x+20=27.51.5x=27.5-201.5x=7.5 x=5
8x-3x=2.55x=2.5 x=2.5÷5 x=0.5
X+2.5=10 X=10-2.5=7.5
8x2.5-2X=13.6相当于2x=8*2.5-13.6解得x=3.2