a. 10b + 13 - 6b + 4 b. 5 ( x + 4 ) + 2x c. 15k + 8 ( 11 - k ) Tolong di bantu yahh udh mau di kumpul

A. 10b+13-6b+4
=10b-6b+13+4
=4b+17

B. 5(x+4)+2x
=5x+20+2x
=5x+2x+20
=7x+20

C. 15k+8(11-k)
=15k+88-8k
=15k-8k+88
=7k+88

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