Question

resolva as seguintes equações:



ajudem por favor

Answer 1

12X -16= 54-2X
12X+2X=54+16

14X=70

x= 14 /70
x=5


5X +4 = 7X+20
5X-7X= 20-4
-2X= 17
X=17÷2=8.5

4(X+5)=2(X-7)
8X +10 = 2X-14
8X-2X=14-10
6X=-24
X=-24÷6
X=-4

Answer 2

Olá, vamos aos cálculos.

a) 12x - 16 = 54 - 2x
12x + 2x = 54+16
14x = 70
x = 70/14
x = 5


b) 5x + 4 = 7x + 20
7x - 5x = 4 - 20
2x = -16
x = -16/2
x = -8


c) 4(x + 5) = 2(x - 7)
4x + 20 = 2x - 14
4x - 2x = -14 - 20
2x = -34
x = -34/2
x = -17