pls answer this and enjoy solving it
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Step-by-step explanation:
(I) 7x-3x+4
putting values x=12 and y=3
=12×7-3×3+4
=84-9+4
=79
(ii) 8a÷4b
putting values a=2,b=2
=8×2÷4×2
=16÷8
=2
(iii) -3p-r+4q
putting values p=2,r=4,q=-2
=-6-3-8
=-9-8
=-17
(iv) 9l-4m+3n
putting values l=2,m=4,m=5
=18-16+15
=2+15
=17
I hope it helps u
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