Question

Jika P=3x - 2 , Q=x + 5 ,dan R=3 - 2x ,tentukan:
a) P - 3R
b) 2P - 5Q - R
c) (P - 2Q) + 3P - (R + Q)

Answer 1

A) P - 3R = 3x - 2 - 3(3 - 2x)
= 3x - 2 - 9 + 6x
= 9x - 11

b) 2P - 5Q - R = 2(3x - 2) - 5(x + 5) - (3 - 2x)
= 6x - 4 - 5x - 5 - 3 + 6x
= 7x - 12

c) (P - 2Q) + 3P - (R + Q)
= P - 2Q + 3P - R - Q
= 4P - 3Q - R
= 4(3x - 2) - 3(x + 5) - (3 - 2x)
= 12x - 8 - 3x - 15 - 3 + 6x
= 15x - 26

Semoga membantu

Answer 2

A. P-3R
    3x-2-3(3-2x)
    3x-2-9+6x
    3x+6x-2-9
    9x-11

B. 2P-5Q-R
    2(3x-2)-5(x+5)-3-2x
    6x-4-5x-25-3-2x
    6x-5x-2x-4-25-3
     -x-32

C. (P-2Q)+3P-(R+Q)
     {3x-2-2(x+5)}+3(x+5)-(3-2x+x+5)
     3x-2-2x-10+3x+15-3+2x-x-15
     3x-2x+3x+2x+x-2-10+15-3-15
     7x-15