Question

Simplify and solve 3(5z-7)-2(9z-11)= 4(8z-13)-7

Answer 1

$\underline\bold{\huge{SOLUTIONS\: :}}$

3(5z-7)-2(9z-11)=4(8z-13)-7

15z-21-18z+22=32z-52-7

$- 3z + 1 = 32z - 59$

$- 3z - 32z = - 59 - 1$

$- 35z = - 60$

$z = \frac{ - 60}{ - 35}$

$z = \frac{12}{7}$

$\underline\bold{Rules\: for\: sign\: :}$

1)(-)×(-)=+

2)(+)×(-)=-

3)(-)÷(-)=+

4)(-)÷(+)=-

5)(-)×(+)=-