Usuń nawiasy i zredukuj wyrazy podobne.
a) 5x + ( 2x - 7 ) - 9x - ( -3x + 8 ) + 20 - 8x
b) -5x + ( -2y + 4x ) - ( 7x - 8y ) - x + ( 2 - 6y )
c) -9z - ( 4 - 3z) - 8y - ( -7z + 8y ) + (-2y - 7 )
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a) 5x + ( 2x - 7 ) - 9x - ( -3x + 8 ) + 20 - 8x = 5x + 2x - 7 - 9x + 3x - 8 + 20 - 8x =
- 10x + 5
b) -5x + ( -2y + 4x ) - ( 7x - 8y ) - x + ( 2 - 6y ) = -5x - 2y + 4x - 7x + 8y -x + 2 - 6y = - 9x + 2
c) -9z - ( 4 - 3z) - 8y - ( -7z + 8y ) + (-2y - 7 ) = -9z -4 + 3z - 8y + 7z - 8y -2y -7 =
z -11 -16y
a) 5x+2x-7-9x+3x-8+20-8x= -7x+5
b) -5x-2y+4x-7x+8y-x+2-6y = -7x+2
c) -9z-4+3z-8y+7z-8y-2y-7 = z-11-18y
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