Question

Calcule o valor de x nas equações, sendo U = Q

a) 5x = 4x - 9
b) 2x + 6 = x
c)3x + 8 = 2x - 3
d) 7x + 9 - 2x = 20 + 4x + 1

Answer 1

a) 5x-4x=-9

x= -9

b) 2x -x=-6

x= -6

c ) 3x -2x=-3 -8
x = -13

d) 7x -2x -4x = +1 +20 -9
x= 12