What is the essential rule for algebraic equations?

Always do the same to both sides of the equation

If you minus from one side, you add to the other

How would you work out 4y+2=2y+8

(-2y) 2y+2=8 (-2) 2y = 6 (divide by 2) y = 3

(-2) 4y = 2y+6 (-6) 4y - 6 = 2y (-4y) -6 = -2y (+6) 0 = -2y+6 (+2y) 2y = 6 (divide by 2) y = 3

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Ellen Billingham 5 preguntas

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1What is the first thing you do to a linear equation with an x on both sides?
1. AGet rid of the smaller x
2. BAdd them together
2What is the essential rule for algebraic equations?
1. AIf you minus from one side, you add to the other
2. BAlways do the same to both sides of the equation
3How would you work out 4y+2=2y+8
1. A(-2y) 2y+2=8
  (-2) 2y = 6
  (divide by 2) y = 3
2. B(-2) 4y = 2y+6
  (-6) 4y - 6 = 2y
  (-4y) -6 = -2y
  (+6) 0 = -2y+6
  (+2y) 2y = 6
  (divide by 2) y = 3
4What does n equal in this equation?
5n - 2 = n + 46
1. An = 12
2. Bn = 48
5What does 3(y + 2) mean?
1. A3y + 2
2. B3y + 6

Descripción: GCSE (Year 8 Algebra 3) Maths Test sobre Linear Equations with unknowns on Both Sides, creado por Ellen Billingham el 07/05/2013.
Autor: Ellen Billingham
Idioma: English
Visitas: 124
Etiquetas: maths year 8 algebra 3 maths year 8 algebra 3 gcse
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