I need a lot of algebra help. Best answers are given out.?

Question

Please help me?

2. Solve 5(1 – 3m) = 30 – 2(4m + 7)

m = 11/7

m = -11/7

m = 5 7/4

m = -5 7/4

3. Solve s= a+b+c/2 for b

b = ac/2s

b = 2s/ac

b = 2s + a + c

b = 2s – a – c

Answer 1

2. 5(1 – 3m) = 30 – 2(4m + 7)

    5 - 15m = 30 - 8m - 14

    5 - 15m = 16 - 8m

    -11 = 7m

    m = -11/7

3. s= a+b+c/2

    b = s - a - c/2

    think you meant s= (a+b+c)/2

    2s = a + b + c

    b = 2s - a - c