How do you solve #3x-15 = x +21#?

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Answer 1 · 2017-09-21T04:45:09

#x = 18#

# 3x - 15 = x + 21#

Take the terms with variable #x # on one side and remaining terms on other side of the equation.

Apply rule of transposition

# 3x - x = 21 +15#

# 2x = 36# ------------solving

# x= 18# ------------------- dividing both sides of above equation by 2

Answer # x = 18 #