Question

Simplifique as expressões , reduzindo os termos semelhantes :a) a + 1 + a - 7b) -9 + 5m +7x -2xc)xy²  + xy²  + x² yd)3x + 5x + 0,2x  - x +2x

Answer 1

a)
$a + 1 + a - 7$
⇒$2a -6$

b) 
$-9+5m+7x-2x$
⇒$-9 + 5m +5x$

c)
$xy ^{2} + xy ^{2} + x^{2}y$
⇒$2 xy ^{2} + x^{2} y$

d)
$3x + 5x + 0,2x -x + 2x$
$8x+0,2x-x+2x$
$8,2x-x+2x$
$7,2x+2x$
⇒$9,2x$