Given ; 2(10-13x)+9x=-34x+60
step 1 20-26x+9x- -34x+60
step 2 17x= - 34x +40
step 3 51x= 40
step 4 x= 40/51
in what step is there first an error. explain the error and how to correctly work the problem
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step-by-step explanation:

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.