700t+280g+300t+400g
What is 680g+1000t?
400x-350x
What is 50X?
2(2x-10)
What is 4x-20?
-5y +3a -3a +5y +7
What is 7?
1 -2x +3y -4z +4 -3x +2y -z
What is 5 -5x +5y -5z
-7z+9z
2z
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