Question 1 evaluate the expression, using the given value of the variable. 7 – 5x + 4x when x = 3 a) –20 b) 18 c) 4 d) 30 question 2 evaluate the expression, using the given value of the variable. 3 – 7x + 2x when x = 3 a) –30 b)–12 c) –18 d) –24 question 3 evaluate the expression, using the given value of the variable. z ÷ 4 – 8z + 2(z – 5) when z = 12 a) –79 b) 107 c) –74 d) –34 need answer asap