12
-21 = 9a - 15 - 3a -6 = 6a -1 = a
3a-9 = 6 3a = 6+9 3a = 15 a = 15/3 a = 5 Substitute a = 5 into 4a-1. 4a-1 =4(5)-1 =20-1 =19 Therefore, the value of 4a-1 is 19.
3a - 1 = ? relation between a & 3 is ( 3 multiplied by a ) since a = 8, then, 3 * 8 = 24 therefore : (3*8)-1=23
4a + 1 - a =19, rewrite your question, 4a + -a + 1 =19, 3a + 1 =19, subtract 1 from each side 3a = 18, divide by 3, a =6
3a=1divide both sides by 3a=1/3
If: -3a-1 = -15 Then: a = 4 and 2/3
1
a = 14/3
1/3=a
12
Answer to: 5a + 1 = a - 3a = -1
-21 = 9a - 15 - 3a -6 = 6a -1 = a
9 - 3a = 8Add 3a to each side:9 = 8 + 3aSubtract 8 from each side:1 = 3aDivide each side by 3:1/3 = a
3a-9 = 6 3a = 6+9 3a = 15 a = 15/3 a = 5 Substitute a = 5 into 4a-1. 4a-1 =4(5)-1 =20-1 =19 Therefore, the value of 4a-1 is 19.
If 3a+5=5a+3, then: 3a+5 - 3a = 5a+3 - 3a 5=2a+3 5 - 3=2a+3 - 3 2=2a a=1
-3a-12 = 12+12 +12-3a = +12~ ~-3 -3a = -8