Question

X +X x 2+Xx2-2-3=0

Answer 1

x - x * 2 + x * 2 - 2 - 3 = 0

x - 2 = 0 + 3

x - 2 = 3

x = 3 + 2

x = 5

Answer 2

X + X x 2 + X x 2 - 2 - 3 = 0

X + X x 2 + X x 2 = 0 + 3 + 2 = 5

X x 1 + X x 2 + X x 2 = 5

X x (1 + 2 + 2) = 5

X x 5 = 5

X = 5 : 5

X = 1

Answer 3

Nhầm làm lại nha !

x + x * 2 + x * 2 - 2 - 3 = 0

x * 3 + x * 2 - 5 = 0

x * 5 - 5 = 0

x * 5 = 0 + 5

x * 5 = 5

x = 5 : 5

x = 1

Answer 4

X+X x2+Xx2-2-3=0

X x5-2-3=0

X x5-2=0+3

X x 5-2=3

X x5=3+2

Answer 5

X*5-2-3=0

X*5-2=0+3

X*5-2=3

X*5=3+2

X*5=5

X=5:5

X=1