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3t+11 = 29 3t = 29-11 3t = 18 t = 6
Identity property of addition.
Solve this system of equations. 5x+3y+z=-29 x-3y+2z=23 14x-2y+3z=-18 Write the solution as an ordered triple.
The answer is 209. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.
16 + 16 + 16 + 17 + 18 + 18 + 18 + 19 + 19 + 20 + 20 + 20 + 21 = 238