<span>let x be the interval, then:
186 = 50 + 3 + (3+x) + (3+2x) + (3+3x) + (3+4x) + (3+5x) + (3+6x) + (3+7x)
186 = 74 + 28x
x = 4
Eldest son age = 3+7x = 3+28 = 31.</span>
Answer:D
Step-by-step explanation:
4x TIMES 6 IS 24x MINUS 5 IS 19x
4 times 11=44
I think task 1 is B
Hope this helps
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