Question

a)7x - 9 ≤ 2x + 16
b)12x - 4x - 5 > 9 + 2​

Answer 1

letra B

X > 2

.........M..

Answer 2

a)

$7x-9<2x+16\\7x-9+9<2x+16+9\\7x<2x+25\\7x-2x<2x+25-2x\\5x<25\\\frac{5x}{5}<\frac{25}{5}\\x<5$

• x < 5

b)

$12x-4x-5>9+2\\8x-5>9+2\\8x-5>11\\8x-5+5>11+5\\8x>16\\\frac{8x}{8}>\frac{16}{8}\\x > 2$

• x > 2