book Maths Puzzle Numerical Ability

Solve: 1.3y + 4.4 = 0.8y + 4.1

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book Other Question

Please help me do this the cramer rule in math.

x + 3y z=-2
2x + 5y + z=-5
x + 2y +3z= 6 can you please solve this equation 11(4-6y)+5(13y+1)=9