first of all, "expand"
10x + 2 = 9x + 21
subtract 9x from both sides
10x - 9x + 2 = 9x - 9x + 21
x + 2 = 21
subtract 2 from both sides
x + 2 -2 = 21 -2
x = 19
2(5x + 1) = 3(3x + 7)
a) x = 19
b) x = 20
c) x = 21
Can you please explain it step by step please? I don't get the question and I want some easy, thorough explanation with a through guide of what you're calculating. Thank you so much!
3 answers
2(5x + 1) = 3(3x + 7)
Combine the terms.
10x + 2 = 9x + 21
Get the unknowns on one side of the equation. Subtract 9x from both sides.
10x - 9x + 2 = 9x - 9x + 21
x + 2 = 21
Subtract 2 from both sides of the equation.
x = 19
You can prove it by substituting 19 for x in your original problem.
Combine the terms.
10x + 2 = 9x + 21
Get the unknowns on one side of the equation. Subtract 9x from both sides.
10x - 9x + 2 = 9x - 9x + 21
x + 2 = 21
Subtract 2 from both sides of the equation.
x = 19
You can prove it by substituting 19 for x in your original problem.
ok thanks so much the both of you! =D x <3