(1)3×(0.6+x)=4.5 3x=4.5-1.8 x=0.9 |
(2)9x-1.8=5.4 9x=7.2 x=0.8 |
(3)x:20%=2.5:1 x=2.5×20% x=0.5 |
(4)x:=14:0.6 0.6x=6 x=10 |
(5)8x-0.92×5=19 8x=19+4.6 x=2.95 |
(6)14:x=1.25:0.75 1.25x=10.5 x=8.4 |
(7):=:x x= x= |
(8)2.5×3-3x=0.75 3x=7.5-0.75 x=2.25
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(9)-14.5=5.5 =20 x=160 |