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= 5x
1f. 5(m-) -3m-3n
=5m+3m-3n
=8m-3n
2c. 4c-6d-5e-2c-3d-7e
=2c-9d-12e
Cmn sampai situ dlu ya:) semoga membantu
= 3x + 3y +2x - 2y
= 5x + y
f) 5(m -n ) - 3(m + n)
= 5m - 5n - 3m - 3n
= 2m - 8n
= 2(m -4n)
2c) (4c -6d + 5e) + ( -2c - 3d - 7e)
= 4c -2c -6d -3d +5e -7e
= 2c -9d -2e
d) (x²-x-4)+(3x²-x+5)
= x²+3x²-x-x-4+5
=4x²-2x+1
3c) (5p+3q+r)-(p-3d-r)
=5p+3q+r-p+3d+r
=4p+3q+3d+2r
d) (-2c-3d-2e)-(4c-6d+5e)
=-2c-4c-3d+6d-2e-5e
= -6c +3d -7e
4a) 3a+4b + 2a - 10b
= 5a -6b
b) 3(x+y) -(x-y)
= 3x + 3y - x + y
= 2x +4y
= 2(x + 2y)