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-t + 9 = t + 5(if it helps, you can pretend there is a 1 in front of each t)-1t + 9 = 1t + 5Add 1t to both sides-1t + 1t + 9 = 1t + 1t + 5(Keep the variable on the left of the equals sign lessens confusion, so let's flip the terms)9 = 2t + 52t + 5 = 9Subtract 5 from both sides2t + 5 - 5 = 9 - 5Divide both sides by 22/2t = 4/2t = 2
2t - 12 - 3t = 60 -1t - 12 = 60 -1t -12 +12 = 60 + 12 -1t = 72 t = -72
km (kilometer) is a unit of length; a ton is a unit of mass. You can't convert those.
pound is labeled lb., not pound
a pound is a pound is a pound!!!a pound of anything always weighs a pound doesn't matter if it is feathers or bricks!!!