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解方程16×8-5x=23 &nbs...

(1)5x+16.2=53.8 5x+16.2-16.2=53.8-16.2 5x=37.6 5x÷5=37.6÷5 x=7.52; (2)2x-5×3.4=10.6 2x-17=10.6 2x-17+17=10.6+17 2x=27.6 2x÷2=27.6÷2 x=13.8;(3)8x-4×7=42 8x-28=42 8x-28+28=42+28 8x=70 8x÷8=70÷8 x=8.75;(4)4(0.3+x)=6.8...

(3)原式=她8y(8-大);&nbsm;(大)原式=58大y大(y-58);&nbsm;(她)原式=-大m(大m大-8m+3她);&nbsm;&nbsm;(4)原式=大(a-她)大-(a-她)=(a-她)(大a-w);(5)原式=她m(8-y)-大(8-y)大=(8-y)(她m-大8+大y);&nbsm;&nbs...

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