Question

resolva as equações.
A)7(x-2)=5(x+3)
B)2(x-5)+4(x-1)=0
C)3(2x-1)=-2(x+3)
D)7(x-1)-2(x-5)=x-5

Answer 1

$A)7(x-2)=5(x+3)\to 7x-14=5x+15\to 7x-5x=15+14\to \\ 2x=29\to x= \frac{29}{2} \to x=14,5 \\\\\\\\ B)2(x-5)+4(x-1)=0\to 2x-10+4x-4=0\to 2x+4x=10+4 \\ 6x=14\to x= \frac{14}{6} \to x= \frac{7}{3} \to 2,333... \\\\\\\\C)3(2x-1)=-2(x+3) \to 6x-3=-2x-6\to 6x+2x=-6+3\to \\ 8x=-3\to x=- \frac{3}{8} \to x=-0,375\\\\\\\\ D)7(x-1)-2(x-5)=x-5\to 7x-7-2x+10=x-5\to \\ 7x-2x-x=-5+7-10\to 4x=-8\to x=- \frac{8}{4} \to x=-2$