-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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