answer to the IQ question
A + B = 76, A - B = 38, A / B = ?.
A + B = 76 ... Eqn 1, A -B = 38 .. Eqn 2. From equation 2 find A, A - B = 38, A = 38 + B.
Sub A into eqn 1
A + B = 76, 38 + B + B = 76,
38 + 2B = 76 collect the like terms.
2B = 76 - 38, 2B = 38 there4, B = 38/2 = 19.
A + B = 76, A + 19 = 76, A = 76 - 19 = 57. A = 57, B = 19.
A/B = 57/19 = 3.
A + B = 76, A - B = 38, A / B = ?.
ReplyDeleteA + B = 76 ... Eqn 1, A -B = 38 .. Eqn 2. From equation 2 find A, A - B = 38, A = 38 + B.
Sub A into eqn 1
A + B = 76, 38 + B + B = 76,
38 + 2B = 76 collect the like terms.
2B = 76 - 38, 2B = 38 there4, B = 38/2 = 19.
A + B = 76, A + 19 = 76, A = 76 - 19 = 57. A = 57, B = 19.
A/B = 57/19 = 3.