Question

Me ajudem urgente nessa conta n to conseguindo fazer ??​

Answer 1

11)

a)

$\frac{5}{2}x - 20 = 2x + 10 \times (2) \\ 5x - 40 = 4x + 20 \\ 5x - 4x = 40 + 20 \\ x = 60$

b)

$\frac{3}{2}x = x + 15 \times( 2) \\ 3x = 2x + 30 \\ 3x - 2x = 30 \\ x = 30$

c)

$\frac{x}{2} + x = 180 \times (2) \\ x + 2x = 360 \\ 3x = 360 \\ x = \frac{360}{3} \\ x = 120$

12)

a)

$\frac{2}{3}x = x - 16 \times (3) \\ 2x = 3x - 48 \\ 3x - 2x = 48 \\ x = 48$

b)

$30 + y + 90 = 180 \\ y = 180 - 120 = 60$

$2y + p = 180 \\ 2.60 + p = 180 \\ p = 180 - 120 = 60$