exam Maths Puzzle Numerical Ability

how do you solve for a system of linear equations y=2/3x-1 and y=-x+4

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exam Other Question
index is 4. square root 625n to the 8th power m to the 4th power.
please help! can you help me solve for x and y

[3 4y] = [ 3 2]
5 8 2x-1 8



i tried and i got this,

3+4y=3
-4 -4
3y=-1
- -
3 3


y=-1/3