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=5x+8y-5c
2.4a+5b-3c+8a+5c
=4a+8a+5b-3c+5c
=12a+5b+2c
3.5p+2q+3r+4r
=5p+2q+7r
5.2ab+3a+5ba-2b
=7ab+3a-2b
yg no 4 saya gk tau maaf ya