exam Maths Puzzle Numerical Ability

Y=3x+5
2y-6x=4
using elimination

Read Solution (Total 0)

exam Other Question

(-3-5)sqrt2+(-4-2)sqrt2 this is supposed to add up to sqrt100 and then into 10 how is this problem done? I need help with this innequality: 1/5 (one fifth)x + 1/2 (one half) is > 4/5 (four fifths)