Respuesta :

Answer:

5. x=14

6 x=5

Step-by-step explanation:

31+9x+23=180

step 1 combine like terms

54+9x=180

step 2 subtract each side by 54

9x=126

step 4 divide each side by 9

x=14

21x-9=90+27

step 1 combine like terms

21x-9=117

step 2 add 9 to each side

21x=126

step 3 divide each side by 21

x=5

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