2007-10-02 11:27:26 · 8 answers · asked by davydoohoo 1 in Science & Mathematics ➔ Mathematics
7B = 3A - 30
3A = 7B + 30
A = (7/3)B + 10
2007-10-06 11:16:11 · answer #1 · answered by Como 7 · 0⤊ 0⤋
B=3/7(A-10)
just multiply both sides by 7/3 to get rid of that 3/7
7B/3=A-10
7B/3+10=A
(7B+30)/3 = A
2007-10-02 18:59:59 · answer #2 · answered by cgflann 4 · 0⤊ 0⤋
First, leave the parenthesis by itself so take the 3/7... turn it around and take it to the other side of the equal sign so now (7/3)B = A- 10
now just move the 10 to the other side, since it's being subtracted on one side, when you move it to the other side you're going to add it.... so
A = (7/3)B + 10
Hope it helped :)
2007-10-02 18:36:51 · answer #3 · answered by Ms. Perry 2 · 0⤊ 0⤋
B=3/7(A-10) (given problem)
B=3/7A-30/7 (distribute 7 to A and 10)
7/3B=A-30/7 (multiply both sides by 7/3)
7/3B+30/7=A (add 30/7 to both sides)
A=7/3B+30/7 (probably wrong)
2007-10-02 18:41:48 · answer #4 · answered by ProgramedBoy 2 · 0⤊ 0⤋
B=3/7(A-10)
B(7/3)=(7/3)(3/7)(A-10)
7B/3=A-10
7B/3+10=A
A=7B/3+10
2007-10-02 18:31:13 · answer #5 · answered by "Steve Jobs" 3 · 0⤊ 1⤋
B=3/7(A-10)
distribute
B=3/(7A-70)
Multiply
B * (7A-70) = 3/(7A-70) * (7A-70)
B * (7A-70) = 3
Divide
(7A-70) = 3/B
Add
7A = 70 + 3/B
Divide
A = 10 + (3/B)/7
2007-10-02 18:34:52 · answer #6 · answered by saberhilt 4 · 0⤊ 0⤋
3/7= 0.42
then multiply out the brackets like so:
0.42 x A = 0.42A
0.42 x 10 = 4.2
A = 0.42A - 4.2 =)
2007-10-02 18:32:47 · answer #7 · answered by Rob L 1 · 0⤊ 1⤋
3/7+(-10/1) u'll get -30/8 and u simplify that and u'll get -15/4
2007-10-02 18:36:57 · answer #8 · answered by bandtime35 3 · 0⤊ 0⤋