Reduce la siguiente expresión algebraica: -3x +4 -x +1= 3a -3b +a +b=
-6 +3a -5b +1 +2a -b=
-6 +3a -5b +1 +2a -b=
3a -b -7a -3 -b +1=

Necesito que me reduzcan las expresiones algebraicas

-3x +4 -x +1 =  5 - 4x

3a -3b +a +b =  4a - 2b

-6 +3a -5b +1 +2a -b =  5a -6b -5

3a -b -7a -3 -b +1= -2b -4a -2

Hope this helps ^-^

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.