Question

C) ×-2/3 - ×+1/4=4 D) 8 (×-1)=8-4 (2×-3) E) 4 (×+10)-2 (×-5)

Answer 1

Resposta passo a passo:

$C)\ \frac{x-2}{3} -\frac{x+1}{4} =4\\\\ \frac{4(x-2)}{4(3)} -\frac{3(x+1)}{3(4)} =4\\\\ \frac{4x-8}{12} -\frac{3x+3}{12} =4\\\\ \frac{4x-8-(3x+3)}{12} =4\\\\ \frac{4x-8-3x-3}{12} =4\\\\ \frac{x-11}{12} =4\\\\ x-11 =4(12)\\\\ x-11 =48\\\\ x=48+11\\\\ \bold{x=59}$

$D)\ 8(x-1)=8-4(2x-3)\\\\ 8(x-1)+4(2x-3)=8\\\\ (4)2(x-1)+4(2x-3)=8\\\\ 4(2x-2)+4(2x-3)=8\\\\ 4(2x-2+2x-3)=8\\\\ 4(4x-5)=8\\\\ 4x-5=\frac{8}{4} \\\\4x-5=2\\\\ 4x=2+5\\\\4x=7\\\\\bold{x=\frac{7}{4}} \\\\x=\frac{4+3}{4} \\\\x=\frac{4}{4} +\frac{3}{4} \\\\x=1+0,75\\\\\bold{x=1,75}$

$E)\ 4(x+10)-2(x-5)\\\\ 4x+40-2x+10\\\\\bold{2x+50}$