exam Maths Puzzle Numerical Ability

2x + y - 4z = 5

3x - y - 6z = 2

2x + 3y - 4z = 11

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exam Other Question

Hello. My question is s=n/2(f+l) and you solve for l.

l=L in lowercase.
Thank you if you help me! I know this is your free time.
Write an equation, in the slope-intercept form, if possible, for each of the following lines:

(a) The line through (0,2) that is parallel to the line

(b) The line through (0,-3) and (4,0)