Miss Tilton.  Equation: a math sentence with an equal sign  7x = – 35  Solution: a value for a variable that makes an equation true.  7x = – 35 

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Presentation transcript:

Miss Tilton

 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

 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

 Find the solution by testing each choice:  x + 5 = – 3:2, – 2, or – 8  = – 3?  7 ≠ – 3  – = – 3?  3 ≠ – 3  – = – 3?  – 3 = – 3  x = – 8

 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