How do you evaluate 7x - 2 - 6x + 15 for x = -2? Algebra Expressions, Equations, and Functions PEMDAS 1 Answer Meave60 Jul 2, 2015 Substitute #-2# for each #x#. Multiply the coefficients of the #x# terms times #-2#. Then add or subtract as appropriate from left to right. Explanation: #7x-2-6x+15# = #7(-2)-2-6(-2)+15# = #-14-2+12+15# = #-16+12+15# = #-16+27=11# Answer link Related questions What is PEMDAS? How do you use PEMDAS? How do you use order of operations to simplify #3(7-2)-8#? What are common mistakes students make with PEMDAS? How do you evaluate the expression #5[8+(3-1)]-2#? How do you simplify the expression #4(30-(3+1)^2)#? How do you evaluate the expression #x^4+x# if x=2? Is it okay to add first before subtracting in #4-6+3#? How do you simplify #(-3)^2+12*5#? How do you simplify #(4-2)^3-4*8+21div3#? See all questions in PEMDAS Impact of this question 1566 views around the world You can reuse this answer Creative Commons License