Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{x = 3}}}}}[/tex]
Step-by-step explanation:
[tex] \sf{15x + 6 = 10x + 21}[/tex]
Move 10x to left hand side and change it's sign
Similarly, move 6 to right hand side and change it's sign
[tex] \dashrightarrow{ \sf{15x - 10x = 21 - 6}}[/tex]
Collect like terms
[tex] \dashrightarrow{ \sf{5x = 21 - 6}}[/tex]
Subtract 6 from 21
[tex] \dashrightarrow{ \sf{5x = 15}}[/tex]
Divide both sides by 5
[tex] \dashrightarrow{ \sf{ \frac{5x}{5} = \frac{15}{5}}} [/tex]
Calculate
[tex] \dashrightarrow{ \sf{x = 3}}[/tex]
Hope I helped!
Best regards! :D
