Question

a) 3(×-2)<5x-8

b) 2(x-3)+3(×-1)<36

c) 5×-1>9

d)7×-4>9x+12

Me ajudemmm​

Answer 1

Resposta:

a)

$3(x - 2) < 5x - 8 \\ 3x - 6 < 5x - 8 \\ 3x - 5x < - 8 + 6 \\ - 2x < - 2 \\ 2x > 2 \\ x = 2 \div 2 \\ x > 1$

b)

$2(x - 3) + 3(x - 1) < 36 \\ 2x - 6 + 3x - 3 < 36 \\ 5x - 9 < 36 \\ 5x <36 + 9 \\ 5x < 45 \\ x < 45 \div 5 \\ x < 9$

c)

$5x - 1 > 9 \\ 5x > 9 + 1 \\ 5x > 10 \\ x > 10 \div 5 \\ x > 2$

d)

$7x - 4 > 9x + 12 \\ 7x - 9x > 12 + 4 \\ - 2x > 16 \\ 2x < - 16 \\ x < - 16 \div 2 \\ x < 8$