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Published byBuck Newman Modified over 8 years ago
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Miss Tilton
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Equation: a math sentence with an equal sign 7x = – 35 Solution: a value for a variable that makes an equation true. 7x = – 35 Is the solution for x: – 28; 5; or – 5? – 5 because 7(– 5) = – 35
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Find the solution by testing each choice: 34m = 714:8, 11, or 21 34(8) = 714? 272 ≠ 714 34(11) = 714? 374 ≠ 714 34(21) = 714? 714 = 714 m = 21
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Find the solution by testing each choice: x + 5 = – 3:2, – 2, or – 8 2 + 5 = – 3? 7 ≠ – 3 – 2 + 5 = – 3? 3 ≠ – 3 – 8 + 5 = – 3? – 3 = – 3 x = – 8
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Use mental math to solve the equation: – 4y = – 20*think: what times – 4 = – 20? y = 5 m + 7 = 15*think: what plus 7 = 15? m = 8 t – 3 = 7*think: what minus 3 = 7? t = 10
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