Question

gente ser vo6 entenderam ai dar pra mim ajuda a resolver essas inequaçoes

1) resolva as inequaçoes seguintes no universo R
a)2x/2-1≥ x/10+3x/8


b)4x-3(x+2)/4<1/2+2(1-3x)


c)2a-a-4/2≠1

ajude ai

Answer 1

Agora sim!

a)
$\frac{2x}{2} -1 \geq \frac{x}{10} + \frac{3x}{8}$

mmc(2,10,8)=40

$\frac{40x-40 \geq 4x+15x}{40}$

$40x-4x -15x \geq 40$

$21x \geq 40$

$x \geq \frac{40}{21}$

b)

$4x- \frac{3(x+3)}{4} < \frac{1}{2} +2(1-3x)$

mmc(2,4)=4

$\frac{16x-3(x+2)<2+8(1-3x)}{4}$

$16x-3(x+2)<2+8(1-3x)$

$16x-3x-6<2+8-24x$

$16x-3x+24x<2+8+6$

$37x<16$

$x< \frac{16}{37}$

d)
$2a-a- \frac{4}{2} \neq 1$

$2a-a-2 \neq 1$

$2a-a \neq 1+2$

$a \neq 3$