book Maths Puzzle Numerical Ability

I cant figure out how to solve this equation. 2(2x+9)=-16 Can you please help me?

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book Other Question

Tony is 6 years older than his brother. 4 years ago, he was twice as old

How old is Tony
How old is his brother Please help me. Graph the function f(x)=2x - 1 for values of x where -1≤ x ≤4 (show all working)