解方程 ×-30%×=4.9

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解方程 ×-30%×=4.9
解方程 ×-30%×=4.9

解方程 ×-30%×=4.9
×-30%×=4.9
(1-30%)x=4.9
70%x=4.9
x=4.9÷70%
x=7

x-30%x=4.9
1x-30%x=490%
(1-30%)x=490%
70%x=490%
x=490%÷70%
x=4.9÷0.7
x=7

×-30%×=4.9
(1-30%)x=4.9
70%x=4.9
x=4.9÷70%
x=7

×-30%×=4.9
(1-30%)x=4.9
70%x=4.9
x=4.9÷70%
x=7 (蛮容易滴)

X - 15%X = 68 3.5X+1.8=12.3 3.6X÷2=2.16 0.8X-4=1.6
5X÷2=10 X-0.25X=3 4+0.7X=102 X-0.125X=8 x-0.375x=3/4
5 X-2.4×5=8 15X÷2=60 4X+X=3.15 3.4X+1.8=8.6
5X-X=2.4 1.5...

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X - 15%X = 68 3.5X+1.8=12.3 3.6X÷2=2.16 0.8X-4=1.6
5X÷2=10 X-0.25X=3 4+0.7X=102 X-0.125X=8 x-0.375x=3/4
5 X-2.4×5=8 15X÷2=60 4X+X=3.15 3.4X+1.8=8.6
5X-X=2.4 1.5X-X=1 6.6X-6X=1.8 x - 0.8x = 16+6
X+25%X=90 12x=300-4x 30÷x+25=85 410-3x=170 3(x+0.5)=21 0.5x+8=43 6x-3x=18 1.5x+18=3x 5×3-x÷2=8 9x-40=5 x÷5+9=21 48-27+5x=31 10.5+x+21=56 x+2x+18=78 (200-x)÷5=30 (x-140)÷70=4 0.1(x+6)=3.3×0.4 4(x-5.6)=1.6 7(6.5+x)=87.5 (27.5-3.5)÷x=4 x+19.8=25.8 5.6x=33.6 9.8-x=3.8 75.6÷x=12.6 5x+12.5=32.3 5(x+8)=102 x+3x+10=70 3(x+3)=50-x+3 5x+6=11 2x-8=10 1/2x-8=4 12+34x=56 22-14x=12 54-X=24 7X=49 126÷X=42 13+A=28.5 2.4X=26.4 70%X + 20%X = 3.6 2X+7X=9/10 180+6X=330 2.2X-1=10 X-0.8X=10 X+ 2/5X=21

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