Which operation will solve the equation?

m minus 20 equals 9
question 2 options:

add 9 to each side.

subtract 9 from each side.

add 20 to each side.

subtract 20 from each side.

save

is there any photos or whatever?

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.

its totaly b

your welcome btw

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag