2. 解下列方程:
(1) $2(x-2)-3(4x-1)=4$;
(2) $10+2(x-\dfrac{1}{2})=7(x-2)$;
(3) $6(\dfrac{1}{3}a-1)=3a+7$;
(4) $2x-3(x+3)=x+3$。
(1) $2(x-2)-3(4x-1)=4$;
(2) $10+2(x-\dfrac{1}{2})=7(x-2)$;
(3) $6(\dfrac{1}{3}a-1)=3a+7$;
(4) $2x-3(x+3)=x+3$。
答案
(1)x=$-\frac{1}{2}$ (2)x=$\frac{23}{5}$ (3)a=-13 (4)x=-6
3. 解下列方程:
(1) $3x - 2(x - 1) = 2 + 3(4 - x)$;
(2) $3x - 1 = 2(x - 2)$;
(3) $15x - 3 = 3(x - 4)$;
(4) $3x - 2(x - 1) = 4$;
(5) $10 + 4(x - 3) = 2x + 4$;
(6) $4x + 3 = 2(x - 1) + 1$;
(7) $5x = 1 - 2(x - 1)$;
(8) $\frac{3}{5} × [ \frac{5}{3}(2x - 1) ] = x + 2$;
(1) $3x - 2(x - 1) = 2 + 3(4 - x)$;
(2) $3x - 1 = 2(x - 2)$;
(3) $15x - 3 = 3(x - 4)$;
(4) $3x - 2(x - 1) = 4$;
(5) $10 + 4(x - 3) = 2x + 4$;
(6) $4x + 3 = 2(x - 1) + 1$;
(7) $5x = 1 - 2(x - 1)$;
(8) $\frac{3}{5} × [ \frac{5}{3}(2x - 1) ] = x + 2$;
答案
(1)x=3 (2)x=-3 (3)x=$-\frac{3}{4}$ (4)x=2
(5)x=3 (6)x=-2 (7)x=$\frac{3}{7}$ (8)x=3
(5)x=3 (6)x=-2 (7)x=$\frac{3}{7}$ (8)x=3
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