Jawabanmu

2014-08-26T18:47:46+07:00
1.7x+8x-12x+25x=15x+13x=28x 2.8q-6q+10q-4q=2q+6q=8q 3.11r+3r-15r+20r=14r+5r=19r 4.9y-7y+11y-8y=2y+3y=5y 5.20z-15z+30z-15z=5z+15z=20z maaf ya cuman ada 5
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