-2x, -7x+5x, -4, 3x+7x-2(5x+2), 11, 50-x+70=111, -1/5x, -7/10x + 5/10x, -2x+10, 8x+(-10x)+2(3+2), x=1, 5x-2(x-2)-6=x, 18x+24y+102, 24(2+y)+18(3+x), 4y+23, 8+4(2+y)+7, 39, Dona had to do an experiment in the Antartida. Her submarine was 16 ft below sea level, and there was a helicopter monitoring her at 23 ft above the sea level. How many feet apart is the submarine from the helicopter?, 10, The number of tables in a restaurant is twice the number of chairs plus 6. There are 36 pieces of furniture in total (chairs plus tables) How many tables are there in the restaurant?, 175.00, Gabriel has a debt of 250.00 USD. He pays 50.00 USD the first month and then he pays another 25.00 USD. How much does he still own?, x=20, 2x+3x=100, x=5, 9x+8=53, 14x+41, 10(2x+5)-3(2x-3), 3, During the summing competition a girl reached 15 ft below the surface level. Another girl reached 18 ft below surface level. What is the difference in feet between both competitors?, x=12, 24+x=36, x=4, 166+x=170, x=10, 4x=40.

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