1)x+21=64-x-11
2x=32; x=16
2)7x-4>=1; 7x>=5; x>=5/7
3)x+3=16; x=13
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1)x+21=64-x-11
2x=32; x=16
2)7x-4>=1; 7x>=5; x>=5/7
3)x+3=16; x=13