a) 4x + 5 - 2x ≤ 20 – 3x – 3b) ( 2 – 3x ) : 4 ≥ x + 4.... Question from @kolegaqwerty

October 2018 2 16 Report

a) 4x + 5 - 2x ≤ 20 – 3x – 3

b) ( 2 – 3x ) : 4 ≥ x + 4

mlodypolityk

a) 4x+5-2x≤20-3x-3

2x+5≤17-3x

5x≤12

x≤12/5

xe(-nieskonczonosc;12/5>

b) 1/2-3/4x≥x+4

7/4x≤-7/2

x≤-2

xe(-nieskonczonosc;-2>

2 votes Thanks 0

vivindalka

$4x+5-2x\leq20-3x-3\\2x+5\leq17-3x\\2x+3x\leq17-5\\5x\leq12\ /\ :\ 5\\x\leq\frac{12}{5}\\x\leq2\frac25$

$x\ \in\ (\ -\infty\ ;\ 2\frac25\ >$

$\frac{2-3x}{4}\geq\ x+4\ /\ \cdot\ 4\\2-3x\geq4x+16\\-3x-4x\geq16-2\\-7x\geq14\ /\ :\ (-7)\\x\leq-2$

$x\ \in\ (\ -\infty\ ;\ -2\ >$

0 votes Thanks 1

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