How do you combine $3 x + - 5 + (- 7 x) + 2$ $3x+ -5+(-7x)+2$ ?

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Answer 1 · 2018-07-07T17:54:38

$- 4 x - 3$ $-4x - 3$

$3 x + - 5 + (- 7 x) + 2$ $3x + -5 + (-7x) + 2$

Adding a negative number is the same thing as without the addition sign, so it becomes:
$3 x - 5 - 7 x + 2$ $3x - 5 - 7x + 2$

Color-code like terms:
$color(red)(3x) quadcolor(blue)(-quad5) quadcolor(red)(-quad7x) quadcolor(blue)(+quad2)$

Combine like terms:
$-4x - 3$

Hope this helps!

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