exam Maths Puzzle Numerical Ability

describe a first step for solving each system using elimination.
1)x+y=6
x+3y=10

2)x-y=12
x+y=22

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exam Other Question

n-5/6n-6 = 1/9 - n-3/4n-4

I tried to my best to type the fractions so I hope this makes sense. Can you help me solve this? 2x+(x-24)=90 what does x equal?