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x/2 + (x-4)/3
samakan penyebutnya
jadi
= (3x + 2x - 8)/6
= (5x-8)/6
2.
(x+1)/3 - (x-2)/4
samakan penyebutnya
=(4(x+1) - 3(x-2))/12
=(4x+4-3x+6)/12
=(x+10)/12
3.
4/(x+3) - 3/(x-2)
samakan penyebutnya
=(4(x-2) - 3(x+3)) / (x+3)(x-2)
=(4x-8-3x-9) / (x^2+x-6)
= (x-17) / (x^2+x-6)
4.
(x+4)/(x-9) + 2/(x+3)
samakan penyebutnya
= ((x+4)(x+3) +2(x-9)) / (x-9)(x+3)
= (x^2+7x+12+2x-18) / (x^2-6x-27)
= (x^2+9x-6) / (x^2-6x-27)
semoga membantu
jadikan yang terbaik ya:)