Given: angle 1 and angle 4 form a linear pair; angle 1 and angle 2 are supplementary

Prove: Angle 3 ~= angle 4

i really hope this helps

Step-by-step explanation:

Given

angle1 + angle2 = 180

angle3 + angle4 = 180

then angle1 + angle2 = angle3 + angle4 : substitution

    angle1 - angle3 = angle4 - angle2  : subtracts angle 3 and angle 2 from both sides

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.