Question

拜托了！六年级的解方程

(12)2.5x+5.6-4.9=4.6x-1.4 (13)11-2.5(x-3)=10.5 (14)o.9+x=0.6(2.5-x) (15)2.4x+6.4=4x-4.8 (16)4.5×1.4-0,6x=2.1 (17)1.5(2x+o.4)=44-0.5x (18)8x-12.4=16(x-2.4) (19)3(x+2)=8(x-4) (20)72-4.5x=3(1.5x+12)

Answer 1

2.5x+5.6-4.9=4.6x-1.4 2.1=2.1x x=1 11-2.5(x-3)=10.5 2.5x-7.5=0.5 2.5x=8 x=3.2 o.9+x=0.6(2.5-x) 0.9+x=1.5-0.6x 1.6x=0.6 x=0.375 2.4x+6.4=4x-4.8 11.2=1.6x x=7 4.5×1.4-0,6x=2.1 6.3-0.6x=2.1 4.2=0.6x x=7 1.5(2x+o.4)=44-0.5x 3x+0.6 =44-0.5x 3.5x =41.4 x =414/35 8x-12.4=16(x-2.4) 8x-12.4=16x-38.4 26=8x x=13/4 3(x+2)=8(x-4) 3x+6 =8x-32 38=5x x=7.6 72-4.5x=3(1.5x+12) 72-4.5x=4.5x+36 36=9x x=4

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