(11) -9x - x + 3 + 5 (12) 11x - 21 + 11 - 6x

(13) 7x + 2 - 5 + 8

(14) 12x + x - 3x + 7 + 2

(15) 2x +3y +7x - 2y

(16) 6x + 7y - 2x

Anyone know this process my teacher didn’t explain it throughly with bigger numbers

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5