f(2x-3)=4x+5..nilai nya dari f(-7) berapa gan???.......

Langsung aja y

2x - 3 = -7
2x = -7 + 3
x = -4 : 2
x = -2

f(-7) = 4(-2) + 5
f(-7) = -8 + 5
f(-7) = -3

Semoga berguna +_+