Question

Simplifique As Expressões:

A) a + 1 + a - 7
B) -9x + 5m = 7x - 2m
C) xy² + xy² + x²y
D) 3x + 5x + 0,2x - x + 2x

Answer 1

a)
$a + 1 + a - 7 \\ 2a - 6$
b)
$- 9x + 5m = 7x - 2m \\ - 9x + 7x + 5m - 2m \\ - 2x + 3m$
c)
$xy ^{2} + xy ^{2} + x ^{2}y \\ 2xy ^{2} + x ^{2} y$
d)
$3x + 5x. {?}^{?} + 0.2 x - x + 2x \\ 8x + x + 2x \\ 9x + 2x$
espero ter ajudado!!