Question

SOLVE .........2x -8x = 40 + 4x +50 - 158

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Answer 1

Answer:

a40=a1+(n−1)d =2+39(3)=119. Then find the sum: Sn=n(a1+an)2S40=40(2 + 119)2=2420. Example 3: Find the sum: 50∑k=1(3k+2).

Step-by-step explanation:

Hope it's helpful for you

Answer 2

2x -8x = 40 + 4x +50 - 158

•2x-8x=90+4x-158

•2x-8x=4x-68

•-6x=4x-68

•-6x-4x=-68

•-10x=-68(-&- gets cancelled)

•x=68/10

•x=6.8

hope it helps you