How to solve simultaneous equations

Solve Simultaneous Equations

7
STEPS
TOOLS

Write the question

Write the question

Draw two arrows from both equations

Draw two arrows from both equations

Keep top line the same

Keep top line the same

Times bottom by two

Times bottom by two

Cross out both Ys as they will equal 0 and find the answer to X and the equals

Cross out both Ys as they will equal 0 and find the answer to X and the equals

Work out X by dividing the 10X and the -20 getting X as -2

Work out X by dividing the 10X and the -20 getting X as -2

To find Y rewrite the bottom equation and substitute X for from the previous answer being -2

To find Y rewrite the bottom equation and substitute X for from the previous answer being -2

Work out the new equation

Work out the new equation

Move all numbers to the right remember to change symbol figure out right side to find Y

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