Can you tell me the step-by-step way to do this problem please?

If we need to find measure of each acute angle (<90) then here u go:

so u have 2 acute angles and 1 right angle which equals 90°.

you also know that sum of 3 angles equals 180°.

sum of these two acute angles will be equal to 90° (subtract right angle from 180)

make equality:

first acute angle+second acute angle=90°

(7x+6)+(6x-7)=90

13x-1= 90. (Just open brackets)

13x=91. (add 1 to both sides)

x=91/13

x=7

now you just have to put x value inside

(7x+6)°=7×7+6=49+6=55°

and

(6x-7)°=6×7-7=35°

ab will be equal to

what "following statement"?

step-by-step explanation: