Question

1-Simplifique as expressões, reduzindo os termos semelhantes.

A) Xy² + X² Y+ Xy²

B)2X+3Y-5X-7Y+8-X-1

C) 9Xy-X²+Y²-3Xy+5X²+6Y²

2-Resolva as Equações do 1° Grau.

A) 4X-1=3(X-1)

B)6X=2X+16

C)3(2X+3)-4(X-1)=3

Answer 1

1.

a)
$2x {y}^{2} + {x}^{2} y$
b)
$- 4x - 4y + 7$
c)
$6xy + 4 {x}^{2} + 7 {y}^{2}$

2.

a)
$4x - 1 = 3x - 3 \\ 4x - 3x = - 3 + 1 \\ x = - 2$

b)
$6x - 2x = 16 \\ 4x = 16 \\ x = 16 \div 4 = 4$

c)
$6x + 9 - 4x + 4 = 3 \\ 2x + 13 = 3 \\ 2x = 3 - 13 = - 10 \\ x = - 10 \div 2 = - 5$