Why is 7a+4−2a is equivalent to 7a+-2a+4?

communitive property it doen't matter which way you put it the equation will still be the same.

Step-by-step explanation:

7a+-2a+4

7a+4−2a

im pretty sure it would be 5 am, hope that , and give brainliest and guys if this is right then press the button and give 5 stars

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4