Answer:
25y+52x+15z+7(6y+3x+4z)+10y+9x+12z = 82x +77y+55z
Step-by-step explanation:
25y+52x+15z+7(6y+3x+4z)+10y+9x+12z
in this equation first open the bracket and muliply the sign
25y + 52x + 15z + 42y + 21x +28z + 10y +9x+12x
combine the x , y and z variable
then
52x + 9x +21x +25y+42y+ + 10y +15z +28z +12z
addition of the values of same variables
then
82x +77y+55z
hence the answer is
82x +77y+55z
