Question

Me ajudem a montar as contas

Answer 1

4) $2x+3x-15=4x+9 \\ x=24$

5) $2x+2-6x+15=6x-3 \\ -10x=-20 \\ x=2$

6) $2x=3 \\ x= \frac{2}{3}$

7) $x-2x+1=23 \\ -x=22 \\ x=-22$

8) $2x-x+1=5-x+3 \\ 2x=7 \\ x= \frac{7}{2}$