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---- =10. 3x +x=24+4. ------- +2=20+2
3. 4× =28. 2
2x =10×3. x =28÷4. 5x
2x =30. x=7. -------+2 =22
x =30÷2. 2
x =15. 5×
------- =22-2
2
5×
------ =20
2
5x. =20×2
5x. =40
x. =40÷5
x =8