Its 1.
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To clarify the order of operations in the math problem, you can use parentheses as follows: (3 times 42) plus (84 divide by 2) plus (2) equals 56.
2 + 6 * 7 = 2 + 42 = 44
42
To find what number times 2 equals 42, you can set up the equation 2x = 42, where x represents the unknown number. To solve for x, you divide both sides by 2, which gives you x = 21. Therefore, 21 times 2 equals 42.
b = 40 - a, c = 42 - a so b + c = 40 - a + 42 - a, ie 82 -2a = 34 so a = 48/2 ie 24 b = 40 - 24 ie 16 and c = 42 - 24 ie 18