13.2x9x33.3

3(6.9+X)=13.23(3.9+X)=13.23X+20.7=13.23X=13.2-20.73X=-7.5X=-2.5

(13.2-x+2.8)除以3=513.2-x+2.8=5×313.2-x+2.8=15x=13.2+2.8-15x=1 (13.2-x+2.8)除以3=5(13.2-x+2.8)=5*3=1516-X=15X=1(13.2-x+

3*(x-6)=13.2列方程方程两边除以3得x-6=4.4两边加6得x=10.4

3x+百分之120等于13.23x+百分之120等于13.23x+1.2=13.23x=12x=43x+百分之120等于13.23x+1.2=13.23x=13.2-1.23x=12x=12/3x=43x+1.2=13.23x=13.2-1

3X{X+0.4}=13.2方程式怎么算3X{X+0.4}=13.23x+3×0.4=13.23x+1.2-1.2=13.2-1.23x=12x=43x²+0.4*3x=13.23X{X+0.4}=13.2第一个是乘还是x呀是乘楼

解方程：3x＋x=13.24x=13.2x=3.33.3

3X{X+0.4}=13.2方程式怎么算3X{X+0.4}=13.23x+3×0.4=13.23x+1.2-1.2=13.2-1.23x=12x=4同学你没有写错题目吗3X2+1.2X=13.230X2+12X-132=010X2+4X-4

3(4.5x-1.2)=7x+13.2yetrtd3(4.5x-1.2)=7x+13.23×4.5x-3×1.2=7x+13.213.5x-3.6=7x+13.213.5x-7x=13.2+3.66.5x=16.8x=16.8÷6.5x=1

13.2+3x＝33.312.8-x＝5.4 6.2,18.2

3(4.5x-1.2)=7x+13.23(4.5x-1.2)=7x+13.213.5x-3.6=7x+13.26.5x=16.8x=168/656.5x=16.8x=168/65

X+(3x-6)=[X+(3x-6)]*0.8+13.2怎么解0.2[x+(3x-6)]=13.2x+(3x-6)=664x=72x=18X+(3x-6)=[X+(3x-6)]*0.8+13.24x-6=3.2x-4.8+13.20.8x=

0.8(3y-6-y)=3y-6+y-13.22.4y-4.8-0.8y=4y-19.20.8y=14.4y=180.8(2y-6)=4y-19.21.6y-4.8=4y-19.22.4y=14.4y=6原式：2.4y-4.8-0.8y=3

一.13.2x+9x=33.3二.13（x+5）=169三.3（x+2.1）=10.一.13.2x+9x=33.3二.13（x+5）=169三.3（x+2.1）=10.5四.12x-9x=8.7五.1.5（x+1.6）=3.6六.2（x-3

13.2x+x=12.813.2X+9X=33.38X-3X=105X-0.36=1613.2X+9X=33.322.2x=33.3x=1.58X-3X=1055x=105x=21X-0.36=16x=16.36第一题好像不太对啊,你看看题

3X-18=13.21.5X-X=64X+1.2X=263x-18=13.23x=13.2+18x=10.41.5x-x=60.5x=6x=6/0.5=124x+1.2x=265.2x=26x=5

已知17.4÷3x=2.32,那么5x+13.2=（）25.7

（x+1.2)x4=13.20.7x+3x1.4=11.2（x+1.2)x4=13.24x+4.8=13.24x=13.2-4.84x=8.4x=2.10.7x+3x1.4=11.20.7x+4.2=11.20.7x=11.2-4.20.7

解方程组(1-0.8)(x+y)=13.2x=3y-6(1-0.8)(x+y)=13.2①x=3y-6②把①代入②得0.2(3y-6+y)=13.24y-6=66y=18把y=18代入②得x=54-6=48所以方程组的解是{x=48{y=1

0.25×(13.2×7-13.2-2×13.2)简便运算您好，寒樱暖暖为你原式=0.25×13.2×（7-1-2）=0.25×13.2×4=0.25×4×13.2=1×13.2=13.2如果你认可我的回答，请及时点击【采纳为满意回答】按钮

13.2×43+38×13.2+132×1.91320