www.5129.net > 8与5的积比x的3倍多25求x的值

8与5的积比x的3倍多25求x的值

40+25=3x x=65/3

4.2x1.5-3x=3 6.3-3x=3 3x=6.3-3 3x=3.3 x=1.1

解:2.5x+9=3.2*5 2.5x+9=16 2.5x=16-9 2.5x=7 x=7÷2.5 x=14/5

解:2.5x+9=3.2*5 2.5x=16-9 2.5x=7 x=7÷2.5 x=14/5

5.2x=8+2.4 5.2x=10.4 x=2

(1)50-1.5X=3.5 50-1.5X+1.5X=3.5+1.5X 3.5+1.5X=50 3.5+1.5X-3.5=50-3.5 1.5X=46.5 1.5X÷1.5=46.5÷1.5 X=31答:X的值为31.(2)243÷9-8.2×0.5=27-4.1=22.9答:8.2乘以0.5的积比243除以9的商少22.9.

解:4.8×2-x=3.4 9.6-x=3.4 -x=3.4-9.6 -x=-6.2 x=6.2

(1)3x-27=63, 3x=90, x=30;答:x的值是30.(2)x-0.3×0.6=12, x-0.18=12, x=12.18;答:x的值是12.18.(3)1.2x+18=78, 1.2x=60, x=50.答:x的值是50.(4)9x-x=25.6, 8x=25.6, x=3.2.答:x的值是3.2.

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