exam Maths Puzzle Numerical Ability

Can someone help me on this?

Is 4 a solution to the equation x + 7 = 11 ?

Thanks,
Adriana

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exam Other Question

solving inequalities: x + 1< -2 The approximate population of San Jose was 460,000 in 1970. In 1980 it was 630,000. Find k in the growth formula and estimate the population in 2020.