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(8+x)÷5=15怎么解

(8+x)÷5=15 8+x=75 x=67

(8+x)÷5=15 解:8+x=15*5 8+x=75 x=75-8 x=67

(8十x)÷5=15 解:原方程即: (8十x)÷5=15 8+x=15*5 8+x=75 x=75-8 x=67

(1)-7x=0.06-2.16,-7x=-2.1,x=0.3.(2)5/16×(x-0.45)=5/8,x-0.45=2,x=2.45.(3)(3/8+x)×15/4-0.4=45/32,3/8×15/4+15/4x-0.4=45/32,15/4x=0.4,x=8/75

x÷15=8解方程 解:x=8*15 x=120

(182×4+X)÷5-8=X (728+X)÷5=X+8 728+X=5X+40 4X=688 X=172

15.5+x÷8=55.5 x÷8=55.5-15.5 x=40X8 x=320

解:8(x+15)=15(8+12) 8x+120=300 8x=180 x=22.5

(1)215÷4.8x=15.8,215÷4.8x×4.8x=15.8×4.8x, 75.84x=215, 75.84x÷75.84=215÷75.84, x=551896;(2)x2+23x=14, 76x=14, 76x÷76=14÷76, x=12.

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