Answer:
(i) \[x+7+4(x-5)=x+7+4x-20\] \[=x+4x+7-20\] \[\left| \text{rearranging terms} \right.\] \[=5x-13=5(2)-13\] \[=10-13=-3.\] (ii) \[3(x+2)+5x-7=3x+6+5x-7\] \[=3x+5x+6-7\] \[\left| \text{rearranging terms} \right.\] \[=8x-1=8(2)-1\] \[=16-1=15.\] (iii) \[6x+5(x-2)=6x+5x-10\] \[=11x-10=11(2)-10\] \[=22-10=12.\] (iv) \[4(2x-1)+3x+11=8x-4+3x+11\] \[=8x+3x+11-4\] \[\left| \text{rearranging terms} \right.\] \[=11x+7=11(2)+7\] \[=22+7=29\].
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