LO: Solve equations with negative solutions. Progress Check Solve, showing full working: 1)3x = 21 2)x + 5 = 8 3)12 = x - 3 4)4x + 5 = 17 5)36 = 7x + 1.

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Presentation transcript:

LO: Solve equations with negative solutions. Progress Check Solve, showing full working: 1)3x = 21 2)x + 5 = 8 3)12 = x - 3 4)4x + 5 = 17 5)36 = 7x + 1 6)2x – 6 = 8 7)6x + 4 = 7 8)3x – 1 = 0 © NorledgeMaths

1 This set of tiles represents the equation 2x + 4 = -2. = Negative Solutions xx 1 2x = © NorledgeMaths

1 1 We can add blue -1 tiles to cancel out red +1 tiles. Remember we must keep it balanced! = Negative Solutions xx 2x= We must add the same tiles on to both sides to keep the equation balanced. © NorledgeMaths

We then share out the blue tiles between the x tiles. = Negative Solutions xx x = -3 © NorledgeMaths

We could represent this algebraically as follows: Negative Solutions 2x + 4= x=-6 ÷ 2 x=-3 Add on 4 blue tiles to cancel out the red. Share the red tiles out between the 2 x tiles. © NorledgeMaths

1)4x + 3 = -9 2)2x + 7 = 5 3)3x + 9 = -18 4)2x – 8 = -18 5)3x – 5 = -23 Now solve these equations. You must show your method, and you can use the algebra tiles to help you. 1)2x + 10 = 0 2)2x – 4 = -18 3)4x + 3 = 1 4)8x + 5 = -3 5)3x + 6 = -4 1)4x = -8 2)2x = -12 3)x + 5 = -3 4)x + 4 = 2 5)3x + 2 = -7 Some of these solutions are fractions. Draw a sharing diagram if you need to. © NorledgeMaths

1)4x + 3 = -9 2)2x + 7 = 5 3)3x + 9 = -18 4)2x – 8 = -18 5)3x – 5 = -23 Now solve these equations. You must show your method, and you can use the algebra tiles to help you. 1)2x + 10 = 0 2)2x – 4 = -18 3)4x + 3 = 1 4)8x + 5 = -3 5)3x + 6 = -4 1)4x = -8 2)2x = -12 3)x + 5 = -3 4)x + 4 = 2 5)3x + 2 = -7 1)x = -2 2)x = -6 3)x = -8 4)x = -2 5)x = -3 1)x = -3 2)x = -1 3)x = -9 4)x = -5 5)x = -6 1)x = -5 2)x = -11 3)x = -1/2 4)x = -1/4 5)x = -10/3 © NorledgeMaths

Next Steps Make and draw the representation for 2x + 6 = 3x + 3. Try to solve as far as you can. © NorledgeMaths