Question

Find the value of each variable I need 6-10

Answer 1

6) 9x-25+9x-25(sum of base angles)

9x-25+9x-25+104=180(sum of angles in a triangle)

collect like terms

9x+9x-25-25+104=180

18x-50+104=180

18x+54=180

18x=180-54

18x=126

divide both sides by 18

18x÷18=126÷18

x=7