Question

3(x＋5)＋5[(x＋5)－1]＝7(x＋5)－1

Answer 1

3(x＋5)＋5[(x＋5)－1]＝7(x＋5)－1

3x+15+5（x+5-1）=7x+35-1;

3x+15+5x+20=7x+34;

8x-7x=34-35;

x=-1;

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