Solve for "x" ; then solve for: "m</span>∠ACD" ; _______________________________________________________ Add "14" to each side of the equation; and subtract "4x" from each side of the equation ;
4x + 4 + 14 - 4x = 6x - 14 + 14 - 4x ;
to get:
18 = 2x ;
↔ 2x = 18 ;
Divide each side of the equation by "2" ; to isolate "x" on one side of the equation; & to solve for "x" ; __________________________________________________________ 2x / 2 = 18/2 ;
x = 9 . _________________________________________________________ Now, to solve for: " m<span>∠ACD " : </span>_________________________________________________________ m∠ACD = <span>(4x + 4)° ;
Substitute "9" for "x" ; </span> m∠ACD = (4*9) + 4 = 36 + 4 = 40° . _____________________________________________ Answer: " m∠ACD = 40° " . _____________________________________________ Let us check our answer: _____________________________________________ m∠ACD = 40 ; and m<span>∠ABD = (6x - 14) ;
The answer is 487 because you must look one place to the right of the whole number for the rounding digit on the right side of the decimal point which is 0. Then you round down since the digit is not greater than 5.
