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3.1 +3.2 Solving Equations Obj: To solve 1 and two step equations Addition/ subtraction property of equality A=b A+b = b +c A-c = b -c 4=4 4 +2 = 4 +2 6-3 = 6-3 3=3 Multiplication/ Division Property of Equation A=b Ac= bc a c b = c 2(4)=(4)2 8 8 = 8 8 1=1 Commathment “Do unto one side as you do to the other side” Example 1 Is x=4 a solution 3x+19=25 3(4)+19=25 12+19=25 31 = 25 Not a solution Example 2 x-8=5 +8 +8 X =13 operation you do + - - + X X Change sides you change signs!! Example 3 A + 9 = 32 -9 -9 A = 23 Example 4 -9 = - 4 + x +4 +4 -5 = x Example 5 4x = 44 4 4 X = 11 Example 6 3x = -12 5 5 • -3x = 5 • -12 5 -3x = -60 -3 -3 X = 20