solve 0.4z-3/1.5z+9 =7/5
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Answered by
157
Answer :
Now, (0.4z - 3)/(1.5z + 9) = 7/5
⇒ 5 (0.4z - 3) = 7 (1.5z + 9)
⇒ (5 × 0.4)z - (5 × 3) = (7 × 1.5)z + (7 × 9)
⇒ 2z - 15 = 10.5z + 63
⇒ 10.5z - 2z = - 15 - 63
⇒ 8.5z = - 78
⇒ z = - 156/17
∴ the required solution is z = - 156/17
#MarkAsBrainliest
Now, (0.4z - 3)/(1.5z + 9) = 7/5
⇒ 5 (0.4z - 3) = 7 (1.5z + 9)
⇒ (5 × 0.4)z - (5 × 3) = (7 × 1.5)z + (7 × 9)
⇒ 2z - 15 = 10.5z + 63
⇒ 10.5z - 2z = - 15 - 63
⇒ 8.5z = - 78
⇒ z = - 156/17
∴ the required solution is z = - 156/17
#MarkAsBrainliest
Answered by
26
Step-by-step explanation:
0.4z-3/1.5z+9=7/5
=5(0.4z-3)=7(1.5z+9) ( by cross multiplication)
= 2z-15 =10.5z+63
=2z-10.5z =63+15
=8.5z =78
=85/10z=78
=85z=78×10
=z =78×10/85
z=156/17
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