How do you solve system of linear equations

The triangles are similar. what is the value of x? show your work.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.