exam Maths Puzzle Numerical Ability

What is 2Id+3I = 8 and 1.2I5pI=3.6?
I is the absolute value line FYI

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exam Other Question

Multiply. (x - 10)(x + 9)

Thanks. how i can graph 5x+2y+6=0
i rewrite the equation to y=-5/2x-3
the y intercpet is -3
the slope is-5/2
the x intersept is -6/5