Question

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$8(x + 2) < 5x + 4$
??? vă rog mult​

Answer 1

Răspuns:

$8(x + 2) < 5x + 4 \\ 8x + 16 < 5x + 4 \\ 3x < - 12 \\ x < - \frac{12}{3} \\ x < - 4$

Answer 2

Răspuns:

x∈(-∞;-4)

Explicație pas cu pas:

8(x+2)<5x+4

8x+8*2<5x+4

8x+16<5x+4 /-5x

8x+16-5x<5x+4-5x

3x+16<4 /-4

3x+16-4<4-4

3x+12<0 /-12

3x+12-12<0-12

3x<-12 /:3

3x:3<-12:3

x<-4

=> x∈(-∞,-4)