stiimd ca balantele sunt in echilibru, afla cat cantareste ?
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[tex]a + 99 = 612 + 400 \\ a + 99 = 1012 \\ a = 1012 - 99 \\ a = 913[/tex]
[tex]708 + b = 1125 + 65 \\ 708 + b = 1190 \\ b = 1190 - 708 \\ b = 482[/tex]